Yes, and to add to that, I would say, have very clear recommendations in your reports, with deadlines, and then stay on top of that. If the committee gives them a recommendation, you can ask them to report back to you at given intervals, and then you are on top of the progress. That tends to deliver results.
If the programs are very complex and there are long timelines for deliverables, then break it down into smaller chunks if you can, with recommendations that correspond to that, so that the department is checking back more frequently. If it's something of a very complex nature and the committee isn't sure what a realistic timeline is, you can work with management. Ask the deputy ministers how much time they need to get back to you on that or how much time they need to accomplish a certain goal, and work with that.