diff --git a/.rubocop.yml b/.rubocop.yml
index bdeea2d8f..1ab77533c 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -689,6 +689,7 @@ Rails/CreateTableWithTimestamps:
     - db/migrate/2016*.rb
     - db/migrate/2017*.rb
     - db/migrate/2018*.rb
+    - db/migrate/20200630140356_create_traitements.rb
 
 Rails/Date:
   Enabled: false
diff --git a/app/controllers/stats_controller.rb b/app/controllers/stats_controller.rb
index 9e3934c35..d676b5b40 100644
--- a/app/controllers/stats_controller.rb
+++ b/app/controllers/stats_controller.rb
@@ -249,9 +249,11 @@ class StatsController < ApplicationController
     min_date = 11.months.ago
     max_date = Time.zone.now.to_date
 
-    processed_dossiers = dossiers
+    processed_dossiers = Traitement.includes(:dossier)
+      .where(dossier_id: dossiers)
+      .where('dossiers.state' => Dossier::TERMINE)
       .where(:processed_at => min_date..max_date)
-      .pluck(:groupe_instructeur_id, :en_construction_at, :processed_at)
+      .pluck('dossiers.groupe_instructeur_id', 'dossiers.en_construction_at', :processed_at)
 
     # Group dossiers by month
     processed_dossiers_by_month = processed_dossiers
@@ -290,11 +292,13 @@ class StatsController < ApplicationController
     min_date = 11.months.ago
     max_date = Time.zone.now.to_date
 
-    processed_dossiers = dossiers
+    processed_dossiers = Traitement.includes(:dossier)
+      .where(dossier: dossiers)
+      .where('dossiers.state' => Dossier::TERMINE)
       .where(:processed_at => min_date..max_date)
       .pluck(
-        :groupe_instructeur_id,
-        Arel.sql('EXTRACT(EPOCH FROM (en_construction_at - created_at)) / 60 AS processing_time'),
+        'dossiers.groupe_instructeur_id',
+        Arel.sql('EXTRACT(EPOCH FROM (dossiers.en_construction_at - dossiers.created_at)) / 60 AS processing_time'),
         :processed_at
       )
 
diff --git a/app/controllers/users/dossiers_controller.rb b/app/controllers/users/dossiers_controller.rb
index 4d9c75b04..531a30db1 100644
--- a/app/controllers/users/dossiers_controller.rb
+++ b/app/controllers/users/dossiers_controller.rb
@@ -149,7 +149,7 @@ module Users
       errors = update_dossier_and_compute_errors
 
       if passage_en_construction? && errors.blank?
-        @dossier.en_construction!
+        @dossier.passer_en_construction!
         NotificationMailer.send_initiated_notification(@dossier).deliver_later
         @dossier.groupe_instructeur.instructeurs.with_instant_email_dossier_notifications.each do |instructeur|
           DossierMailer.notify_new_dossier_depose_to_instructeur(@dossier, instructeur.email).deliver_later
diff --git a/app/models/dossier.rb b/app/models/dossier.rb
index b1898d2e2..987d8fa32 100644
--- a/app/models/dossier.rb
+++ b/app/models/dossier.rb
@@ -42,6 +42,7 @@ class Dossier < ApplicationRecord
   has_many :followers_instructeurs, through: :follows, source: :instructeur
   has_many :previous_followers_instructeurs, -> { distinct }, through: :previous_follows, source: :instructeur
   has_many :avis, inverse_of: :dossier, dependent: :destroy
+  has_many :traitements, -> { order(:processed_at) }, inverse_of: :dossier, dependent: :destroy
 
   has_many :dossier_operation_logs, -> { order(:created_at) }, dependent: :nullify, inverse_of: :dossier
 
@@ -128,6 +129,7 @@ class Dossier < ApplicationRecord
         :individual,
         :followers_instructeurs,
         :avis,
+        :traitements,
         etablissement: :champ,
         champs: {
           etablissement: :champ,
@@ -172,6 +174,7 @@ class Dossier < ApplicationRecord
       justificatif_motivation_attachment: :blob,
       attestation: [],
       avis: { piece_justificative_file_attachment: :blob },
+      traitements: [],
       etablissement: [],
       individual: [],
       user: [])
@@ -198,10 +201,9 @@ class Dossier < ApplicationRecord
       .joins(:procedure)
       .where("dossiers.en_instruction_at + (duree_conservation_dossiers_dans_ds * INTERVAL '1 month') - INTERVAL :expires_in < :now", { now: Time.zone.now, expires_in: INTERVAL_BEFORE_EXPIRATION })
   end
-  scope :termine_close_to_expiration, -> do
-    state_termine
-      .joins(:procedure)
-      .where("dossiers.processed_at + (duree_conservation_dossiers_dans_ds * INTERVAL '1 month') - INTERVAL :expires_in < :now", { now: Time.zone.now, expires_in: INTERVAL_BEFORE_EXPIRATION })
+  def self.termine_close_to_expiration
+    dossier_ids = Traitement.termine_close_to_expiration.pluck(:dossier_id).uniq
+    Dossier.where(id: dossier_ids)
   end
 
   scope :brouillon_expired, -> do
@@ -249,7 +251,7 @@ class Dossier < ApplicationRecord
   end
 
   scope :for_procedure, -> (procedure) { includes(:user, :groupe_instructeur).where(groupe_instructeurs: { procedure: procedure }) }
-  scope :for_api_v2, -> { includes(procedure: [:administrateurs], etablissement: [], individual: []) }
+  scope :for_api_v2, -> { includes(procedure: [:administrateurs], etablissement: [], individual: [], traitements: []) }
 
   scope :with_notifications, -> do
     # This scope is meant to be composed, typically with Instructeur.followed_dossiers, which means that the :follows table is already INNER JOINed;
@@ -282,7 +284,6 @@ class Dossier < ApplicationRecord
   delegate :types_de_champ, to: :procedure
   delegate :france_connect_information, to: :user
 
-  before_validation :update_state_dates, if: -> { state_changed? }
   before_save :build_default_champs, if: Proc.new { groupe_instructeur_id_was.nil? }
   before_save :update_search_terms
 
@@ -294,6 +295,16 @@ class Dossier < ApplicationRecord
   validates :individual, presence: true, if: -> { procedure.for_individual? }
   validates :groupe_instructeur, presence: true
 
+  def motivation
+    return nil if !termine?
+    traitements.any? ? traitements.last.motivation : read_attribute(:motivation)
+  end
+
+  def processed_at
+    return nil if !termine?
+    traitements.any? ? traitements.last.processed_at : read_attribute(:processed_at)
+  end
+
   def update_search_terms
     self.search_terms = [
       user&.email,
@@ -508,27 +519,29 @@ class Dossier < ApplicationRecord
     end
   end
 
+  def after_passer_en_construction
+    update!(en_construction_at: Time.zone.now) if self.en_construction_at.nil?
+  end
+
   def after_passer_en_instruction(instructeur)
     instructeur.follow(self)
 
+    update!(en_instruction_at: Time.zone.now) if self.en_instruction_at.nil?
     log_dossier_operation(instructeur, :passer_en_instruction)
   end
 
   def after_passer_automatiquement_en_instruction
+    update!(en_instruction_at: Time.zone.now) if self.en_instruction_at.nil?
     log_automatic_dossier_operation(:passer_en_instruction)
   end
 
   def after_repasser_en_construction(instructeur)
-    self.en_instruction_at = nil
-
-    save!
     log_dossier_operation(instructeur, :repasser_en_construction)
   end
 
   def after_repasser_en_instruction(instructeur)
     self.archived = false
-    self.processed_at = nil
-    self.motivation = nil
+    self.en_instruction_at = Time.zone.now
     attestation&.destroy
 
     save!
@@ -537,7 +550,7 @@ class Dossier < ApplicationRecord
   end
 
   def after_accepter(instructeur, motivation, justificatif = nil)
-    self.motivation = motivation
+    self.traitements.build(state: Dossier.states.fetch(:accepte), instructeur_email: instructeur.email, motivation: motivation, processed_at: Time.zone.now)
 
     if justificatif
       self.justificatif_motivation.attach(justificatif)
@@ -553,6 +566,7 @@ class Dossier < ApplicationRecord
   end
 
   def after_accepter_automatiquement
+    self.traitements.build(state: Dossier.states.fetch(:accepte), instructeur_email: nil, motivation: nil, processed_at: Time.zone.now)
     self.en_instruction_at ||= Time.zone.now
 
     if attestation.nil?
@@ -565,7 +579,7 @@ class Dossier < ApplicationRecord
   end
 
   def after_refuser(instructeur, motivation, justificatif = nil)
-    self.motivation = motivation
+    self.traitements.build(state: Dossier.states.fetch(:refuse), instructeur_email: instructeur.email, motivation: motivation, processed_at: Time.zone.now)
 
     if justificatif
       self.justificatif_motivation.attach(justificatif)
@@ -577,7 +591,7 @@ class Dossier < ApplicationRecord
   end
 
   def after_classer_sans_suite(instructeur, motivation, justificatif = nil)
-    self.motivation = motivation
+    self.traitements.build(state: Dossier.states.fetch(:sans_suite), instructeur_email: instructeur.email, motivation: motivation, processed_at: Time.zone.now)
 
     if justificatif
       self.justificatif_motivation.attach(justificatif)
@@ -766,16 +780,6 @@ class Dossier < ApplicationRecord
     end
   end
 
-  def update_state_dates
-    if en_construction? && !self.en_construction_at
-      self.en_construction_at = Time.zone.now
-    elsif en_instruction? && !self.en_instruction_at
-      self.en_instruction_at = Time.zone.now
-    elsif TERMINE.include?(state) && !self.processed_at
-      self.processed_at = Time.zone.now
-    end
-  end
-
   def send_dossier_received
     if saved_change_to_state? && en_instruction? && !procedure.declarative_accepte?
       NotificationMailer.send_dossier_received(self).deliver_later
diff --git a/app/models/instructeur.rb b/app/models/instructeur.rb
index 27fc5223e..b1e6db2a1 100644
--- a/app/models/instructeur.rb
+++ b/app/models/instructeur.rb
@@ -161,7 +161,7 @@ class Instructeur < ApplicationRecord
       h = {
         nb_en_construction: groupe.dossiers.en_construction.count,
         nb_en_instruction: groupe.dossiers.en_instruction.count,
-        nb_accepted: groupe.dossiers.accepte.where(processed_at: Time.zone.yesterday.beginning_of_day..Time.zone.yesterday.end_of_day).count,
+        nb_accepted: Traitement.where(dossier: groupe.dossiers.accepte, processed_at: Time.zone.yesterday.beginning_of_day..Time.zone.yesterday.end_of_day).count,
         nb_notification: notifications_for_procedure(procedure, :not_archived).count
       }
 
diff --git a/app/models/procedure.rb b/app/models/procedure.rb
index 5da6426ad..126062de2 100644
--- a/app/models/procedure.rb
+++ b/app/models/procedure.rb
@@ -438,7 +438,15 @@ class Procedure < ApplicationRecord
   end
 
   def usual_traitement_time
-    percentile_time(:en_construction_at, :processed_at, 90)
+    times = Traitement.includes(:dossier)
+      .where(state: Dossier::TERMINE)
+      .where(processed_at: 1.month.ago..Time.zone.now)
+      .pluck('dossiers.en_construction_at', :processed_at)
+      .map { |(en_construction_at, processed_at)| processed_at - en_construction_at }
+
+    if times.present?
+      times.percentile(90).ceil
+    end
   end
 
   def populate_champ_stable_ids
@@ -610,18 +618,6 @@ class Procedure < ApplicationRecord
     end
   end
 
-  def percentile_time(start_attribute, end_attribute, p)
-    times = dossiers
-      .where.not(start_attribute => nil, end_attribute => nil)
-      .where(end_attribute => 1.month.ago..Time.zone.now)
-      .pluck(start_attribute, end_attribute)
-      .map { |(start_date, end_date)| end_date - start_date }
-
-    if times.present?
-      times.percentile(p).ceil
-    end
-  end
-
   def ensure_path_exists
     if self.path.blank?
       self.path = SecureRandom.uuid
diff --git a/app/models/traitement.rb b/app/models/traitement.rb
new file mode 100644
index 000000000..cbbdd2464
--- /dev/null
+++ b/app/models/traitement.rb
@@ -0,0 +1,10 @@
+class Traitement < ApplicationRecord
+  belongs_to :dossier
+
+  scope :termine_close_to_expiration, -> do
+    joins(dossier: :procedure)
+      .where(state: Dossier::TERMINE)
+      .where('dossiers.state' => Dossier::TERMINE)
+      .where("traitements.processed_at + (procedures.duree_conservation_dossiers_dans_ds * INTERVAL '1 month') - INTERVAL :expires_in < :now", { now: Time.zone.now, expires_in: Dossier::INTERVAL_BEFORE_EXPIRATION })
+  end
+end
diff --git a/app/views/dossiers/show.pdf.prawn b/app/views/dossiers/show.pdf.prawn
index 475bf1274..36c1c6329 100644
--- a/app/views/dossiers/show.pdf.prawn
+++ b/app/views/dossiers/show.pdf.prawn
@@ -156,7 +156,7 @@ def add_etats_dossier(pdf, dossier)
   if dossier.en_instruction_at.present?
     format_in_2_columns(pdf, "En instruction le", try_format_date(dossier.en_instruction_at))
   end
-  if dossier.processed_at?.present?
+  if dossier.processed_at.present?
     format_in_2_columns(pdf, "Décision le", try_format_date(dossier.processed_at))
   end
 
diff --git a/app/views/instructeurs/dossiers/_decisions_rendues_block.html.haml b/app/views/instructeurs/dossiers/_decisions_rendues_block.html.haml
new file mode 100644
index 000000000..fd329cf0a
--- /dev/null
+++ b/app/views/instructeurs/dossiers/_decisions_rendues_block.html.haml
@@ -0,0 +1,19 @@
+.tab-title Décisions rendues
+- if traitements.any?
+  %ul.tab-list
+    - traitements.each do |traitement|
+      - if traitement.instructeur_email.present?
+        %li
+          = "Le #{l(traitement.processed_at, format: '%d %B %Y à %R')}, "
+          = traitement.instructeur_email
+          a
+          %strong= t(traitement.state, scope: 'activerecord.attributes.traitement.state').downcase
+          ce dossier
+      - else
+        %li
+          = "Le #{l(traitement.processed_at, format: '%d %B %Y à %R')}, "
+          ce dossier a été
+          %strong= t(traitement.state, scope: 'activerecord.attributes.traitement.state').downcase
+- else
+  %p.tab-paragraph Aucune décision n'a été rendue
+
diff --git a/app/views/instructeurs/dossiers/personnes_impliquees.html.haml b/app/views/instructeurs/dossiers/personnes_impliquees.html.haml
index 7a5ac4cde..e30a3e70e 100644
--- a/app/views/instructeurs/dossiers/personnes_impliquees.html.haml
+++ b/app/views/instructeurs/dossiers/personnes_impliquees.html.haml
@@ -13,3 +13,5 @@
   = render partial: 'instructeurs/dossiers/personnes_impliquees_block', locals: { emails_collection: @avis_emails, title: "Personnes à qui un avis a été demandé", blank: "Aucun avis n'a été demandé" }
 
   = render partial: 'instructeurs/dossiers/personnes_impliquees_block', locals: { emails_collection: @invites_emails, title: "Personnes invitées à consulter ce dossier", blank: "Aucune personne n'a été invitée à consulter ce dossier" }
+
+  = render partial: 'instructeurs/dossiers/decisions_rendues_block', locals: { traitements: @dossier.traitements }
diff --git a/config/locales/models/dossier/fr.yml b/config/locales/models/dossier/fr.yml
index 5ed0cb43d..d79072067 100644
--- a/config/locales/models/dossier/fr.yml
+++ b/config/locales/models/dossier/fr.yml
@@ -9,13 +9,13 @@ fr:
         montant_projet: 'Le montant du projet'
         montant_aide_demande: "Le montant d’aide demandée"
         date_previsionnelle: "La date de début prévisionnelle"
-        state:
+        state: &state
           brouillon: "Brouillon"
           en_construction: "En construction"
           en_instruction: "En instruction"
           accepte: "Accepté"
           refuse: "Refusé"
-          sans_suite: "Sans suite"
+          sans_suite: "Classé sans suite"
         autorisation_donnees: Acceptation des CGU
         state/brouillon: Brouillon
         state/en_construction: En construction
@@ -23,3 +23,6 @@ fr:
         state/accepte: Accepté
         state/refuse: Refusé
         state/sans_suite: Sans suite
+      traitement:
+        state:
+          <<: *state
diff --git a/db/migrate/20200630140356_create_traitements.rb b/db/migrate/20200630140356_create_traitements.rb
new file mode 100644
index 000000000..d2dc10748
--- /dev/null
+++ b/db/migrate/20200630140356_create_traitements.rb
@@ -0,0 +1,11 @@
+class CreateTraitements < ActiveRecord::Migration[5.2]
+  def change
+    create_table :traitements do |t|
+      t.references :dossier, foreign_key: true
+      t.references :instructeur, foreign_key: true
+      t.string :motivation
+      t.string :state
+      t.timestamp :processed_at
+    end
+  end
+end
diff --git a/db/migrate/20200707082256_remove_instructeur_id_and_add_instructeur_email_to_traitements.rb b/db/migrate/20200707082256_remove_instructeur_id_and_add_instructeur_email_to_traitements.rb
new file mode 100644
index 000000000..33f954f60
--- /dev/null
+++ b/db/migrate/20200707082256_remove_instructeur_id_and_add_instructeur_email_to_traitements.rb
@@ -0,0 +1,6 @@
+class RemoveInstructeurIdAndAddInstructeurEmailToTraitements < ActiveRecord::Migration[5.2]
+  def change
+    add_column :traitements, :instructeur_email, :string
+    remove_column :traitements, :instructeur_id
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index a3aaf999f..5e8ef8db9 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2020_06_11_122406) do
+ActiveRecord::Schema.define(version: 2020_07_07_082256) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -560,6 +560,15 @@ ActiveRecord::Schema.define(version: 2020_06_11_122406) do
     t.string "version", null: false
   end
 
+  create_table "traitements", force: :cascade do |t|
+    t.bigint "dossier_id"
+    t.string "motivation"
+    t.string "state"
+    t.datetime "processed_at"
+    t.string "instructeur_email"
+    t.index ["dossier_id"], name: "index_traitements_on_dossier_id"
+  end
+
   create_table "trusted_device_tokens", force: :cascade do |t|
     t.string "token", null: false
     t.bigint "instructeur_id"
@@ -660,6 +669,7 @@ ActiveRecord::Schema.define(version: 2020_06_11_122406) do
   add_foreign_key "received_mails", "procedures"
   add_foreign_key "refused_mails", "procedures"
   add_foreign_key "services", "administrateurs"
+  add_foreign_key "traitements", "dossiers"
   add_foreign_key "trusted_device_tokens", "instructeurs"
   add_foreign_key "types_de_champ", "types_de_champ", column: "parent_id"
   add_foreign_key "users", "administrateurs"
diff --git a/lib/tasks/deployment/20200630154829_add_traitements_from_dossiers.rake b/lib/tasks/deployment/20200630154829_add_traitements_from_dossiers.rake
new file mode 100644
index 000000000..9940c9843
--- /dev/null
+++ b/lib/tasks/deployment/20200630154829_add_traitements_from_dossiers.rake
@@ -0,0 +1,18 @@
+namespace :after_party do
+  desc 'Deployment task: add_traitements_from_dossiers'
+  task add_traitements_from_dossiers: :environment do
+    puts "Running deploy task 'add_traitements_from_dossiers'"
+
+    dossiers_termines = Dossier.state_termine
+    progress = ProgressReport.new(dossiers_termines.count)
+    dossiers_termines.find_each do |dossier|
+      dossier.traitements.create!(state: dossier.state, motivation: dossier.motivation, processed_at: dossier.processed_at)
+      progress.inc
+    end
+    progress.finish
+
+    # Update task as completed.  If you remove the line below, the task will
+    # run with every deploy (or every time you call after_party:run).
+    AfterParty::TaskRecord.create version: '20200630154829'
+  end
+end
diff --git a/spec/controllers/api/v2/graphql_controller_spec.rb b/spec/controllers/api/v2/graphql_controller_spec.rb
index 8f80a0019..67fa3d713 100644
--- a/spec/controllers/api/v2/graphql_controller_spec.rb
+++ b/spec/controllers/api/v2/graphql_controller_spec.rb
@@ -596,7 +596,7 @@ describe API::V2::GraphqlController do
           it "should fail" do
             expect(gql_errors).to eq(nil)
             expect(gql_data).to eq(dossierRefuser: {
-              errors: [{ message: "Le dossier est déjà sans suite" }],
+              errors: [{ message: "Le dossier est déjà classé sans suite" }],
               dossier: nil
             })
           end
diff --git a/spec/controllers/instructeurs/dossiers_controller_spec.rb b/spec/controllers/instructeurs/dossiers_controller_spec.rb
index 88a228c27..ec2d68386 100644
--- a/spec/controllers/instructeurs/dossiers_controller_spec.rb
+++ b/spec/controllers/instructeurs/dossiers_controller_spec.rb
@@ -194,7 +194,7 @@ describe Instructeurs::DossiersController, type: :controller do
   describe '#terminer' do
     context "with refuser" do
       before do
-        dossier.en_instruction!
+        dossier.passer_en_instruction!(instructeur)
         sign_in(instructeur.user)
       end
 
@@ -235,7 +235,7 @@ describe Instructeurs::DossiersController, type: :controller do
 
     context "with classer_sans_suite" do
       before do
-        dossier.en_instruction!
+        dossier.passer_en_instruction!(instructeur)
         sign_in(instructeur.user)
       end
       context 'without attachment' do
@@ -277,7 +277,7 @@ describe Instructeurs::DossiersController, type: :controller do
 
     context "with accepter" do
       before do
-        dossier.en_instruction!
+        dossier.passer_en_instruction!(instructeur)
         sign_in(instructeur.user)
 
         expect(NotificationMailer).to receive(:send_closed_notification)
diff --git a/spec/controllers/stats_controller_spec.rb b/spec/controllers/stats_controller_spec.rb
index d4547e81c..a16a9281d 100644
--- a/spec/controllers/stats_controller_spec.rb
+++ b/spec/controllers/stats_controller_spec.rb
@@ -106,26 +106,23 @@ describe StatsController, type: :controller do
     before do
       procedure_1 = FactoryBot.create(:procedure)
       procedure_2 = FactoryBot.create(:procedure)
-      dossier_p1_a = FactoryBot.create(:dossier,
+      dossier_p1_a = FactoryBot.create(:dossier, :accepte,
         :procedure          => procedure_1,
         :en_construction_at => 2.months.ago.beginning_of_month,
         :processed_at       => 2.months.ago.beginning_of_month + 3.days)
-      dossier_p1_b = FactoryBot.create(:dossier,
+      dossier_p1_b = FactoryBot.create(:dossier, :accepte,
         :procedure          => procedure_1,
         :en_construction_at => 2.months.ago.beginning_of_month,
         :processed_at       => 2.months.ago.beginning_of_month + 1.day)
-      dossier_p1_c = FactoryBot.create(:dossier,
+      dossier_p1_c = FactoryBot.create(:dossier, :accepte,
         :procedure          => procedure_1,
         :en_construction_at => 1.month.ago.beginning_of_month,
         :processed_at       => 1.month.ago.beginning_of_month + 5.days)
-      dossier_p2_a = FactoryBot.create(:dossier,
+      dossier_p2_a = FactoryBot.create(:dossier, :accepte,
         :procedure          => procedure_2,
         :en_construction_at => 2.months.ago.beginning_of_month,
         :processed_at       => 2.months.ago.beginning_of_month + 4.days)
 
-      # Write directly in the DB to avoid the before_validation hook
-      Dossier.update_all(state: Dossier.states.fetch(:accepte))
-
       @expected_hash = {
         (2.months.ago.beginning_of_month).to_s => 3.0,
         (1.month.ago.beginning_of_month).to_s => 5.0
@@ -154,30 +151,27 @@ describe StatsController, type: :controller do
     before do
       procedure_1 = FactoryBot.create(:procedure, :with_type_de_champ, :types_de_champ_count => 24)
       procedure_2 = FactoryBot.create(:procedure, :with_type_de_champ, :types_de_champ_count => 48)
-      dossier_p1_a = FactoryBot.create(:dossier,
+      dossier_p1_a = FactoryBot.create(:dossier, :accepte,
         :procedure    => procedure_1,
         :created_at   => 2.months.ago.beginning_of_month,
         :en_construction_at => 2.months.ago.beginning_of_month + 30.minutes,
         :processed_at => 2.months.ago.beginning_of_month + 1.day)
-      dossier_p1_b = FactoryBot.create(:dossier,
+      dossier_p1_b = FactoryBot.create(:dossier, :accepte,
         :procedure    => procedure_1,
         :created_at   => 2.months.ago.beginning_of_month,
         :en_construction_at => 2.months.ago.beginning_of_month + 10.minutes,
         :processed_at => 2.months.ago.beginning_of_month + 1.day)
-      dossier_p1_c = FactoryBot.create(:dossier,
+      dossier_p1_c = FactoryBot.create(:dossier, :accepte,
         :procedure    => procedure_1,
         :created_at   => 1.month.ago.beginning_of_month,
         :en_construction_at => 1.month.ago.beginning_of_month + 50.minutes,
         :processed_at => 1.month.ago.beginning_of_month + 1.day)
-      dossier_p2_a = FactoryBot.create(:dossier,
+      dossier_p2_a = FactoryBot.create(:dossier, :accepte,
         :procedure    => procedure_2,
         :created_at   => 2.months.ago.beginning_of_month,
         :en_construction_at => 2.months.ago.beginning_of_month + 80.minutes,
         :processed_at => 2.months.ago.beginning_of_month + 1.day)
 
-      # Write directly in the DB to avoid the before_validation hook
-      Dossier.update_all(state: Dossier.states.fetch(:accepte))
-
       @expected_hash = {
         (2.months.ago.beginning_of_month).to_s => 30.0,
         (1.month.ago.beginning_of_month).to_s => 50.0
diff --git a/spec/controllers/users/dossiers_controller_spec.rb b/spec/controllers/users/dossiers_controller_spec.rb
index b98d4a090..9dd0cdfd5 100644
--- a/spec/controllers/users/dossiers_controller_spec.rb
+++ b/spec/controllers/users/dossiers_controller_spec.rb
@@ -657,7 +657,7 @@ describe Users::DossiersController, type: :controller do
       let!(:invite) { create(:invite, dossier: dossier, user: user) }
 
       before do
-        dossier.en_construction!
+        dossier.passer_en_construction!
         subject
       end
 
diff --git a/spec/factories/dossier.rb b/spec/factories/dossier.rb
index 222f87b1c..51c2995e7 100644
--- a/spec/factories/dossier.rb
+++ b/spec/factories/dossier.rb
@@ -127,11 +127,23 @@ FactoryBot.define do
     end
 
     trait :accepte do
-      after(:create) do |dossier, _evaluator|
+      transient do
+        motivation { nil }
+        processed_at { nil }
+      end
+
+      after(:create) do |dossier, evaluator|
         dossier.state = Dossier.states.fetch(:accepte)
-        dossier.en_construction_at ||= dossier.created_at + 1.minute
-        dossier.en_instruction_at ||= dossier.en_construction_at + 1.minute
-        dossier.processed_at ||= dossier.en_instruction_at + 1.minute
+        processed_at = evaluator.processed_at
+        if processed_at.present?
+          dossier.en_construction_at ||= processed_at - 2.minutes
+          dossier.en_instruction_at ||= processed_at - 1.minute
+          dossier.traitements.build(state: Dossier.states.fetch(:accepte), processed_at: processed_at, motivation: evaluator.motivation)
+        else
+          dossier.en_construction_at ||= dossier.created_at + 1.minute
+          dossier.en_instruction_at ||= dossier.en_construction_at + 1.minute
+          dossier.traitements.build(state: Dossier.states.fetch(:accepte), processed_at: dossier.en_instruction_at + 1.minute, motivation: evaluator.motivation)
+        end
         dossier.save!
       end
     end
@@ -141,7 +153,7 @@ FactoryBot.define do
         dossier.state = Dossier.states.fetch(:refuse)
         dossier.en_construction_at ||= dossier.created_at + 1.minute
         dossier.en_instruction_at ||= dossier.en_construction_at + 1.minute
-        dossier.processed_at ||= dossier.en_instruction_at + 1.minute
+        dossier.traitements.build(state: Dossier.states.fetch(:refuse), processed_at: dossier.en_instruction_at + 1.minute)
         dossier.save!
       end
     end
@@ -151,14 +163,14 @@ FactoryBot.define do
         dossier.state = Dossier.states.fetch(:sans_suite)
         dossier.en_construction_at ||= dossier.created_at + 1.minute
         dossier.en_instruction_at ||= dossier.en_construction_at + 1.minute
-        dossier.processed_at ||= dossier.en_instruction_at + 1.minute
+        dossier.traitements.build(state: Dossier.states.fetch(:sans_suite), processed_at: dossier.en_instruction_at + 1.minute)
         dossier.save!
       end
     end
 
     trait :with_motivation do
       after(:create) do |dossier, _evaluator|
-        dossier.motivation = case dossier.state
+        motivation = case dossier.state
         when Dossier.states.fetch(:refuse)
           'L’entreprise concernée n’est pas agréée.'
         when Dossier.states.fetch(:sans_suite)
@@ -166,6 +178,7 @@ FactoryBot.define do
         else
           'Vous avez validé les conditions.'
         end
+        dossier.traitements.last.update!(motivation: motivation)
       end
     end
 
diff --git a/spec/helpers/dossier_helper_spec.rb b/spec/helpers/dossier_helper_spec.rb
index 7e90e8807..77ed77905 100644
--- a/spec/helpers/dossier_helper_spec.rb
+++ b/spec/helpers/dossier_helper_spec.rb
@@ -156,7 +156,7 @@ RSpec.describe DossierHelper, type: :helper do
 
     it 'sans_suite is traité' do
       dossier.sans_suite!
-      expect(subject).to eq('Sans suite')
+      expect(subject).to eq('Classé sans suite')
     end
 
     it 'refuse is traité' do
diff --git a/spec/models/concern/tags_substitution_concern_spec.rb b/spec/models/concern/tags_substitution_concern_spec.rb
index 9488976fd..37acae977 100644
--- a/spec/models/concern/tags_substitution_concern_spec.rb
+++ b/spec/models/concern/tags_substitution_concern_spec.rb
@@ -35,6 +35,7 @@ describe TagsSubstitutionConcern, type: :model do
     let(:individual) { nil }
     let(:etablissement) { create(:etablissement) }
     let!(:dossier) { create(:dossier, procedure: procedure, individual: individual, etablissement: etablissement) }
+    let(:instructeur) { create(:instructeur) }
 
     before { Timecop.freeze(Time.zone.now) }
 
@@ -242,7 +243,7 @@ describe TagsSubstitutionConcern, type: :model do
     end
 
     context 'when the dossier has a motivation' do
-      let(:dossier) { create(:dossier, motivation: 'motivation') }
+      let(:dossier) { create(:dossier, :accepte, motivation: 'motivation') }
 
       context 'and the template has some dossier tags' do
         let(:template) { '--motivation-- --numéro du dossier--' }
@@ -318,9 +319,13 @@ describe TagsSubstitutionConcern, type: :model do
 
     context "when using a date tag" do
       before do
-        dossier.en_construction_at = Time.zone.local(2001, 2, 3)
-        dossier.en_instruction_at = Time.zone.local(2004, 5, 6)
-        dossier.processed_at = Time.zone.local(2007, 8, 9)
+        Timecop.freeze(Time.zone.local(2001, 2, 3))
+        dossier.passer_en_construction!
+        Timecop.freeze(Time.zone.local(2004, 5, 6))
+        dossier.passer_en_instruction!(instructeur)
+        Timecop.freeze(Time.zone.local(2007, 8, 9))
+        dossier.accepter!(instructeur, nil, nil)
+        Timecop.return
       end
 
       context "with date de dépôt" do
diff --git a/spec/models/dossier_spec.rb b/spec/models/dossier_spec.rb
index 4af2276c8..732209a4b 100644
--- a/spec/models/dossier_spec.rb
+++ b/spec/models/dossier_spec.rb
@@ -209,8 +209,17 @@ describe Dossier do
     let(:date1) { 1.day.ago }
     let(:date2) { 1.hour.ago }
     let(:date3) { 1.minute.ago }
-    let(:dossier) { create(:dossier, :with_entreprise, user: user, procedure: procedure, en_construction_at: date1, en_instruction_at: date2, processed_at: date3, motivation: "Motivation") }
-    let!(:follow) { create(:follow, instructeur: instructeur, dossier: dossier) }
+    let(:dossier) do
+      d = create(:dossier, :with_entreprise, user: user, procedure: procedure)
+      Timecop.freeze(date1)
+      d.passer_en_construction!
+      Timecop.freeze(date2)
+      d.passer_en_instruction!(instructeur)
+      Timecop.freeze(date3)
+      d.accepter!(instructeur, "Motivation", nil)
+      Timecop.return
+      d
+    end
 
     describe "followers_instructeurs" do
       let(:non_following_instructeur) { create(:instructeur) }
@@ -346,13 +355,14 @@ describe Dossier do
     let(:state) { Dossier.states.fetch(:brouillon) }
     let(:dossier) { create(:dossier, state: state) }
     let(:beginning_of_day) { Time.zone.now.beginning_of_day }
+    let(:instructeur) { create(:instructeur) }
 
     before { Timecop.freeze(beginning_of_day) }
     after { Timecop.return }
 
     context 'when dossier is en_construction' do
       before do
-        dossier.en_construction!
+        dossier.passer_en_construction!
         dossier.reload
       end
 
@@ -361,8 +371,8 @@ describe Dossier do
 
       it 'should keep first en_construction_at date' do
         Timecop.return
-        dossier.en_instruction!
-        dossier.en_construction!
+        dossier.passer_en_instruction!(instructeur)
+        dossier.repasser_en_construction!(instructeur)
 
         expect(dossier.en_construction_at).to eq(beginning_of_day)
       end
@@ -370,9 +380,10 @@ describe Dossier do
 
     context 'when dossier is en_instruction' do
       let(:state) { Dossier.states.fetch(:en_construction) }
+      let(:instructeur) { create(:instructeur) }
 
       before do
-        dossier.en_instruction!
+        dossier.passer_en_instruction!(instructeur)
         dossier.reload
       end
 
@@ -381,39 +392,48 @@ describe Dossier do
 
       it 'should keep first en_instruction_at date if dossier is set to en_construction again' do
         Timecop.return
-        dossier.en_construction!
-        dossier.en_instruction!
+        dossier.repasser_en_construction!(instructeur)
+        dossier.passer_en_instruction!(instructeur)
 
         expect(dossier.en_instruction_at).to eq(beginning_of_day)
       end
     end
 
-    shared_examples 'dossier is processed' do |new_state|
-      before do
-        dossier.update(state: new_state)
-        dossier.reload
-      end
-
-      it { expect(dossier.state).to eq(new_state) }
-      it { expect(dossier.processed_at).to eq(beginning_of_day) }
-    end
-
     context 'when dossier is accepte' do
       let(:state) { Dossier.states.fetch(:en_instruction) }
 
-      it_behaves_like 'dossier is processed', Dossier.states.fetch(:accepte)
+      before do
+        dossier.accepter!(instructeur, nil, nil)
+        dossier.reload
+      end
+
+      it { expect(dossier.state).to eq(Dossier.states.fetch(:accepte)) }
+      it { expect(dossier.traitements.last.processed_at).to eq(beginning_of_day) }
+      it { expect(dossier.processed_at).to eq(beginning_of_day) }
     end
 
     context 'when dossier is refuse' do
       let(:state) { Dossier.states.fetch(:en_instruction) }
 
-      it_behaves_like 'dossier is processed', Dossier.states.fetch(:refuse)
+      before do
+        dossier.refuser!(instructeur, nil, nil)
+        dossier.reload
+      end
+
+      it { expect(dossier.state).to eq(Dossier.states.fetch(:refuse)) }
+      it { expect(dossier.processed_at).to eq(beginning_of_day) }
     end
 
     context 'when dossier is sans_suite' do
       let(:state) { Dossier.states.fetch(:en_instruction) }
 
-      it_behaves_like 'dossier is processed', Dossier.states.fetch(:sans_suite)
+      before do
+        dossier.classer_sans_suite!(instructeur, nil, nil)
+        dossier.reload
+      end
+
+      it { expect(dossier.state).to eq(Dossier.states.fetch(:sans_suite)) }
+      it { expect(dossier.processed_at).to eq(beginning_of_day) }
     end
   end
 
@@ -478,13 +498,14 @@ describe Dossier do
   describe "#send_dossier_received" do
     let(:procedure) { create(:procedure) }
     let(:dossier) { create(:dossier, procedure: procedure, state: Dossier.states.fetch(:en_construction)) }
+    let(:instructeur) { create(:instructeur) }
 
     before do
       allow(NotificationMailer).to receive(:send_dossier_received).and_return(double(deliver_later: nil))
     end
 
     it "sends an email when the dossier becomes en_instruction" do
-      dossier.en_instruction!
+      dossier.passer_en_instruction!(instructeur)
       expect(NotificationMailer).to have_received(:send_dossier_received).with(dossier)
     end
 
@@ -777,6 +798,7 @@ describe Dossier do
 
   describe 'webhook' do
     let(:dossier) { create(:dossier) }
+    let(:instructeur) { create(:instructeur) }
 
     it 'should not call webhook' do
       expect {
@@ -788,19 +810,19 @@ describe Dossier do
       dossier.procedure.update_column(:web_hook_url, '/webhook.json')
 
       expect {
-        dossier.update_column(:motivation, 'bonjour')
+        dossier.update_column(:search_terms, 'bonjour')
       }.to_not have_enqueued_job(WebHookJob)
 
       expect {
-        dossier.en_construction!
+        dossier.passer_en_construction!
       }.to have_enqueued_job(WebHookJob)
 
       expect {
-        dossier.update_column(:motivation, 'bonjour2')
+        dossier.update_column(:search_terms, 'bonjour2')
       }.to_not have_enqueued_job(WebHookJob)
 
       expect {
-        dossier.en_instruction!
+        dossier.passer_en_instruction!(instructeur)
       }.to have_enqueued_job(WebHookJob)
     end
   end
@@ -891,8 +913,11 @@ describe Dossier do
 
     after { Timecop.return }
 
+    it { expect(dossier.traitements.last.motivation).to eq('motivation') }
     it { expect(dossier.motivation).to eq('motivation') }
+    it { expect(dossier.traitements.last.instructeur_email).to eq(instructeur.email) }
     it { expect(dossier.en_instruction_at).to eq(dossier.en_instruction_at) }
+    it { expect(dossier.traitements.last.processed_at).to eq(now) }
     it { expect(dossier.processed_at).to eq(now) }
     it { expect(dossier.state).to eq('accepte') }
     it { expect(last_operation.operation).to eq('accepter') }
diff --git a/spec/models/instructeur_spec.rb b/spec/models/instructeur_spec.rb
index cdef3e0d9..2e69ce40c 100644
--- a/spec/models/instructeur_spec.rb
+++ b/spec/models/instructeur_spec.rb
@@ -478,7 +478,7 @@ describe Instructeur, type: :model do
       before do
         procedure_to_assign.update(declarative_with_state: "accepte")
         DeclarativeProceduresJob.new.perform
-        dossier.update(processed_at: Time.zone.yesterday.beginning_of_day)
+        dossier.traitements.last.update(processed_at: Time.zone.yesterday.beginning_of_day)
         dossier.reload
       end
 
diff --git a/spec/models/procedure_spec.rb b/spec/models/procedure_spec.rb
index 73c96c84b..6d4b5149f 100644
--- a/spec/models/procedure_spec.rb
+++ b/spec/models/procedure_spec.rb
@@ -958,8 +958,7 @@ describe Procedure do
     let(:procedure) { create(:procedure) }
 
     def create_dossier(construction_date:, instruction_date:, processed_date:)
-      dossier = create(:dossier, :accepte, procedure: procedure)
-      dossier.update!(en_construction_at: construction_date, en_instruction_at: instruction_date, processed_at: processed_date)
+      dossier = create(:dossier, :accepte, procedure: procedure, en_construction_at: construction_date, en_instruction_at: instruction_date, processed_at: processed_date)
     end
 
     before do
diff --git a/spec/services/notification_service_spec.rb b/spec/services/notification_service_spec.rb
index 9cb1952ef..59266eab2 100644
--- a/spec/services/notification_service_spec.rb
+++ b/spec/services/notification_service_spec.rb
@@ -66,7 +66,7 @@ describe NotificationService do
         before do
           procedure.update(declarative_with_state: "accepte")
           DeclarativeProceduresJob.new.perform
-          dossier.update(processed_at: Time.zone.yesterday.beginning_of_day)
+          dossier.traitements.last.update!(processed_at: Time.zone.yesterday.beginning_of_day)
           dossier.reload
         end