You need to track your tickets and break them down by equipment and type of call along with the remedy and duration. For equipment failures, track possible cause of failure… coffee spill, poor installation, power… and costs. A ticket for a bad speaker pales in comparison to a blown power supply in a switch. If you are having problems with one speaker manufacturer, switch to another.
Also if you are growing by 100 offices a year, you need to have a detailed specification for the installation and testing.
