Is SOLIDWORKS Manage an extension or add-on to PDM?

What is the relationship between SOLIDWORKS Manage and PDM?

SOLIDWORKS Manage controls PDM — not the other way around. While both systems are bi-directionally integrated with each other to form a single unified system, Manage accounts for the majority of the delivered functionality, making PDM effectively an extension or module of Manage.

However, when you look at the scale of the included functionality, Manage accounts for the majority of the delivered functionality. So in reality, PDM is an extension or ‘module’ of Manage — not Manage an extension of PDM. Once you adopt Manage it assumes control of PDM and integrates PDM data.