Mean Time Between Failures (MTBF) is used as a reliability metric to plan maintenance and spare parts. Which option best matches its purpose?

Mean Time Between Failures (MTBF) is used as a reliability metric to plan maintenance and spare parts. Which option best matches its purpose?

• A. MTBF
• B. Dwell time
• C. Buffer stock
• D. Requisition priority

Answer: (C)

Mean Time Between Failures provides the expected interval between failures for a repairable asset, and that reliability view guides how often maintenance should occur and how many spare parts to have on hand to prevent downtime. Buffer stock is the safety stock of spare parts kept to cover variations in when failures occur and how long repairs take, which is exactly what MTBF-based planning aims to support. Dwell time describes how long a unit sits idle, not the failure frequency; Requisition priority is about ordering urgency rather than stocking levels; MTBF is a metric that informs stocking decisions, not the stock itself. So the concept that best matches MTBF’s purpose is buffer stock.

Mean Time Between Failures provides the expected interval between failures for a repairable asset, and that reliability view guides how often maintenance should occur and how many spare parts to have on hand to prevent downtime. Buffer stock is the safety stock of spare parts kept to cover variations in when failures occur and how long repairs take, which is exactly what MTBF-based planning aims to support. Dwell time describes how long a unit sits idle, not the failure frequency; Requisition priority is about ordering urgency rather than stocking levels; MTBF is a metric that informs stocking decisions, not the stock itself. So the concept that best matches MTBF’s purpose is buffer stock.