I am wondering how you guys make up your night call rotation?

We have about 25 mechanics in our area and there are only about seven or eight of us that take calls; I understand that all service mechanics are contractually obligated to be on the call rotation. This system has worked out fine for many years, but with new installations and new contracts callbacks are increasing.

Increased overtime callbacks are leading to longer wait times for customers and sometimes no service; this is a rare occurrence but we have had several storms and power outages recently.

Our office now wants two men on call at all times. This sounds like a fix, but we are not sure how to implement the plan. The guys on the current rotation want calls and those not on the rotation do not want calls.

Any ideas how to please both parties? Alternate mechanics in the order which calls are received? Second mechanic gets called after primary mechanics has received three or four calls?

Thanks