Using checkbooks

One of your customers asks for an additional task (training, repair work, etc.) that was not included in the maintenance package (with or without a contract). In this case, you can suggest that your customer uses checkbooks.

A checkbook has a number of checks, in which 1 check = 1 task.

This system has no impact on the current contract, but brings you more flexibility in order for you to provide additional assistance outside of the maintenance contract.