There is one sure thing to kill productivity in your team, and that is to meddle with their work.
This is not to say that you shouldn’t check on them, but meddling is a different thing. It is micromanaging, and no worker wants his boss breathing down his neck.
Best thing to do is to start the project right the first time. At the onset, establish the objectives and parameters, make clear the deliverables, agree on the results, and set the timeline. Then leave the team to work on it on their own. You meet with them and discuss the progress of the project based on the timeline set.
George S. Patton says it best, “Never tell people how to do things. Tell them what to do and they will surprise you with their ingenuity.”