In one of my workshops I run a simulation on distibuted and part-time teams. The dynamics for the part-timers are almost always the same. People who work part time may want to fit into the team, but they seldom do. And when they find they don’t fit in, they drift off to more satisfying work.
Mangers and teamleads can make it more likely that the part-time work assignmeent works for all concerned by looking at the work and the working relationship –rather than leaving it all to chance. Otherwise, part-timers find that they work full time on no team (to paraphrase J.B. Rainsberger).