If the Contracting Officer (KO) determines that the term “Job” is appropriate for the UoM on a service contract CLIN, the KO shall ensure that the CLIN is for a single task and that only one payment will be made upon completion and acceptance of the task. Conversely, if the intent is to make performance based payments, the KO shall ensure that the contract contains the clauses compliant with FAR Part 32.10. Otherwise, if the service contract is for a continuous severable service and payments will be made on a monthly basis, the correct UoM should be “month”, “each”, etc., and not “Job”.
This may help as each repair will be preceded by written notice to proceed by the KO after the KO receives a written assessment and acknowledges it's reasonableness.