Selective Application of Decisions

If the decision of management cannot be consistently implemented and enforced then the decision shouldn't have been made. When a manager makes a decision and then selectively implements it they undermine and discredit the validity of the decision. As a manager you need to have enough confidence in your decision to apply it consistently.

The other detriment to selectively applying your decision to employees is the sense of playing favorites and everyone not working under the same rules. This will ultimately undermine the managers authority and discredit any future decisions they may make, no matte how good.