Hmmm... hat we have is perhaps a merge or perhaps just a poor disambiguation to be fixed. Questions:

 One article or two?
 If two, is there a primary topic, and if not is there a case for a two-way DAB?
 If two, what to call the articles?
 If one, what to call it? 

Answer to the last question I think is operational due diligence, uncapitalised. So the current merge proposal at Operational Due Diligence does have something to be said for it, it's just not a very helpful way of (re)raising the issue.