A Board of Investigation may (and should) be convened any time there is an unusual improvement in an org or its statistics.
Such a Board must (a) isolate the reasons or changes which brought about the improvement; (b) draw up their findings in the form of policy or directives to pass them on to the convening authority; and (c) recommend commending any person found responsible for the improvement (the Board does not commend, it only recommends, the convening authority alone may issue the commendation).
All findings of a Board of Investigation must be phrased in terms that may be issued without change by a convening authority as a directive or, by the proper additional lines, policy.
The convening authority may alter this wording but it must be written so that it does not need to be re-written.