A short-form research project across three regional offices, done over two weeks. The brief was simple: understand why a tool that tested well internally wasn't getting adopted on the ground.
Turned out to be mostly a workflow mismatch rather than a tool problem — the tool assumed a step in the process that, in two of the three offices, didn't actually happen the way it was documented. Easy fix once it was visible; hard to see from the outside without sitting with people while they worked.
Delivered as a short written report plus a half-day session walking through the findings with the team.