Send model for approval
You can send a model for approval to the person entered in the Person responsible model attribute.
Prerequisite
The Person responsible model attribute is specified for the model to be approved.
The person responsible has access to the task list.
The database is versionable.
The Manual publication publication mode and Request approval are enabled in the publication settings of the database in which the model is stored.
The model changes are saved and the model is not locked.
Edit and save the relevant model in the modeling component.
Click Approval. The Request approval dialog opens.
Enter a comment for the person responsible.
Click Send.
The approval task is generated for the user responsible in 
My tasks. As long as the model is not approved and has not been published, the publishing status is Not published. The status of the model is Published (outdated) if it has been published before.
Once the model is approved, a version of the model is generated and other users can see your changes in 
Published content.