In an iterative environment, I prefer to err on the side of more restrictive.  If there&#x27;s friction you can loosen the restriction.<p>But if you start loose and need to tighten it you may be in for real pain, because you may be collecting crap data for a long time.  I&#x27;ve worked in places where we axed features because the data cleanup to make it feasible would just take too long.