Fucking tech solutions to a manager problem. The manager should care about the metrics of wait time and client satisfaction.
If waits are low and satisfaction is high. Then who gives fuck all about what techs do in between calls.
Metrics like calls per tech or average length of calls could be used to better understand tech efficiency. Or even rings before pickup. A good pbx can help ensure calls are relatively equally spread between techs. This helps keep one tech from over working for another slacking off. You can have utilization goals so that you aren’t under or over staffed (I’m of the opinion that a techs utilization should be roughly 75-80% and they should have downtime in their shifts to prevent burnout.)
It’s stupid, inhumane, and impossible to expect an employee to track, bill, and work 100% of their shift.