What best defines a maintenance backlog?

• A. The scheduled maintenance tasks for the next period.
• B. Accumulated maintenance work not completed.
• C. The maintenance budget for the year.
• D. A list of spare parts awaiting order.

Answer: (B)

Backlog in maintenance means the accumulated, unfinished maintenance work that has been identified and scheduled but not yet completed. It represents the pending workload waiting to be carried out, and it often grows when tasks are delayed or there aren’t enough resources to finish them on time. This is different from the plan for upcoming work (which lists tasks to be done in the next period), the annual maintenance budget (the financial plan), or a list of spare parts awaiting order (procurement). Tracking backlog helps you gauge risk to equipment reliability and directs resources toward reducing overdue work to prevent unexpected downtime.