diff --git a/docs/ecolyo/functionalities/initialization.md b/docs/ecolyo/functionalities/initialization.md
index f33e0233c024f357f91cb5da17815eab3572061a..bce2a11dbe20407b556bca986fe9e0e553b97ba7 100644
--- a/docs/ecolyo/functionalities/initialization.md
+++ b/docs/ecolyo/functionalities/initialization.md
@@ -139,3 +139,37 @@ UserDuelEntity {
 ### Data managment schema
 
 ![Data Scheme](/img/challengeFlow.png)
+
+### Loader
+
+The initialization process displays progression steps in the splash screen so the user can see what is happening while it is loading. Each initialization function set an error if it fails, which is shown on the Slpash error screnn.
+
+Available loading steps are the followings :
+
+````
+  MIGRATION = 0,
+  CONSENT = 1,
+  PROFILE = 2,
+  ECOGESTURE = 3,
+  CHALLENGES = 4,
+  PRICES = 5,
+  CONSOS = 6,
+
+```
+
+Possible errors are the followings :
+
+```
+  MIGRATION_ERROR = 'migration_error',
+  CONSENT_ERROR = 'consent_error',
+  PROFILE_ERROR = 'profile_error',
+  PROFILETYPE_ERROR = 'profileType_error',
+  ECOGESTURE_ERROR = 'ecogesture_error',
+  CHALLENGES_ERROR = 'challenges_error',
+  ANALYSIS_ERROR = 'analysis_error',
+  INDEX_ERROR = 'index_error',
+  PRICES_ERROR = 'prices_error',
+  CONSOS_ERROR = 'consos_error',
+  PARTNERS_ERROR = 'partners_error',
+  UNKNOWN_ERROR = 'unknown_error',
+```