[Michlib-l] Bonuses to employees

Hello everyone, If you provide bonuses to your staff members, what are the parameters: is it based on hours or years worked, or do you give everyone with a positive annual evaluation the same amount, for instance? Does the director receive a bonus with different criteria? BTW, we're a Class I library, with part-time employees and a full-time director (me) if that matters for the answers. Thanks a lot, Susan Riegler Alden District Library