Strata Managers Fees – How to evaluate

I feel that our strata plan is paying too much and not getting value for money.

Is there a “rule of thumb” which can be used as a starting point to determine if the fees being pair are fair and reasonable?

I appreciate that there are many variables, age and number of buildings, quality, inclusions – pools, lifts, gardens and common area/s etc.

Any advice or suggestions would be appreciated.