Hello everyone 

I am looking for creating a group of user in oder to manage my MRP chain : a user could create a product, then it will be check by a manager N+1 and finally validate by a manager N+2. 

When i create a group i can not anymore see the manufacturing into the user configuration, so i guess my configuration is not done by a proper way. May someone say me how i can do it or send me to a tutorial ? 

Thank you