There are a number of committees. You're right, in that there's a committee that's working at the case level. There is also an executive level committee where senior executives of both agencies meet on a regular basis to discuss the metrics that are being used, or the level of cooperation, to identify potential requirements for change.
Of course, there are personal relationships that factor in. I regularly have contact with my colleagues at CSIS where we have discussions over how we can make things better.