Which of the following is NOT a function of the maintenance bond?

A maintenance bond is specifically designed to ensure that the contractor will maintain the work according to the contract specifications for a certain period after completion. The primary functions of a maintenance bond include providing financial assurance for addressing defective work (which relates to protecting against faulty workmanship) and covering the costs of repairs needed due to such defects over the warranty period.

While maintenance bonds can help ensure that subcontractors are paid and the quality of work is maintained, they do not guarantee the overall completion of the project. The completion guarantee is typically the function of a performance bond, which serves to ensure that the contractor completes all work as agreed in the contract. Thus, the correct choice identifies that guaranteeing completion of the project is not a function of a maintenance bond.