I understand that people seldom commission an evaluation without a specific reason, but sometimes an administrator may use program evaluation as a ploy to postpone or avoid deciding, is such reason desirable?

My pleasure.

Thank you so much for your reply.

Not really. Some reasons for evaluation are undesirable, especially when administrators know what decision they will make but commission a program evaluation solely to give their decision legitimacy. In such a case, you may try to help them develop better reasons if possible.