MDM project staffing model

We're trying to get our hands around the effort involved to implement MDM. Does anyone have a good staffing model for an MDM project? Something that identifies the skill sets required (MDM, XI, etc) and typical timeframe for each phase (e.g. data discovery, consolidation/harmonization, implement, deploy, etc.) Any averages for low/med/high complexity would be helpful also.

Thanks for your help.