The only thing i could dig up on this topic is from RMC (Rita M.) book pg. 356 where it states that team building activities (in the Develop Project Team process) includes:
- Taking classes together
- Milestone parties
- Outside of work trips
- etc.
So, from what i know, Develop Project Team focuses on the TEAM and Manage Project Team focuses on the individuals. This may be why calendars are need in DPT, because you are scheduling group functions that require coordination, where in Manage Team its more about individual performance etc.
I also saw this great analogy made by someone to keep these two processes straight. DPT is like when you are dating, its all the fun stuff while MPT is like marriage where you have to get to the nitty gritty of solving conflict. If you think of it that way, when you are dating you are constantly worried if the person is going to call, when you are going to meet, what your schedules are like. When you are married, well you are married. Lol.