A phased approach-starting small and expanding the user base over time-will help ensure your intranet community continues to grow, not shrink.
“Start small” doesn’t imply a small number of users, though. Your first phase should be simple and should demonstrate the power of the tool, but it should also have a big impact on a large user community.
Select an HR or corporate communications activity for your first phase, because both groups have a need to share information with a large community. Or select a remote workforce as your first step, because business processes within this community can yield dramatic improvements.
Whichever you choose, build upon your successes, continuing to add other high impact, high usage groups. Focus on departments with very specific, localized needs in later project phases.