Can I change the types of interactions?

In order to ensure the consistency of the filters and graphics of the Analytics module, the types of interactions cannot be modified. However, you have the option of creating intermediate steps. See explanation on:
http://www.simple-crm-support.com/2015/12/comment-creer-des-types-dinteractions.html

We recommend that you use interaction models that allow you to adapt Simple CRM to your business processes without changing the interaction types.

Information on the operation and use of this module can be found at
http://logiciel-crm-grc.blogspot.fr/2013/07/generateur-automatique-dinteractions.html