OM-New department in existing organization in SAP HR

My client deals in chocolate products. They are launching juices and wants to create new department for that. It should be independent of their department that process chocolate products. My question is should I define Org Unit, jobs, positions, EE grp, ER grp, Personal group and Personal Subgroup for the department or use the existing objects in my configuration. Please suggest.

Thanks in advance.

Vaqas Khan