Project Server Integration In past versions of SharePoint Server, Project Server was an add-on that needed to be installed and patched separately from SharePoint. This often led to enterprises having a dedicated farm for Project Server, instead of hosting Project Server on the same farm as the enterprise SharePoint farm. In SharePoint Server 2016 , Project Server is fully baked inside. SharePoint 2016 binaries, patches, and language packs include all the fixes needed for Project Server. Project Server is now simply a Service Application you have to configure. However, the licensing for Project Server is still an add-on on the price of the SharePoint license.
So created a site collection based on Project server integration.