What your storeroom's turnover rate means, how to calculate it, and what good looks like across five asset-intensive industries.
This is a free, shareable reference that covers the essentials of Inventory Turns for MRO storerooms. It includes the consumption-based formula (Total Issue Value / Average Inventory Value), the difference between MRO and manufacturing calculation methods, and the Maximo tables involved (MATUSETRANS, INVBALANCES, INVENTORY, INVCOST).
The core of the document is industry benchmarks across five asset-intensive sectors: Aviation (0.5 to 2.0 turns), Oil and Gas (0.8 to 2.5), Transportation (1.5 to 4.0), Utilities (1.0 to 3.0), and Nuclear (0.3 to 1.0). Each benchmark includes context on why the range is what it is, where real waste hides within that range, and what to watch for when comparing your result to the reference.
Your overall storeroom might show 2.5 turns, but that single number hides critical differences. Consumables might turn 8 to 12 times a year. Insurance spares might sit for years by design. Dead stock turns zero and drags the aggregate down. The real value of Inventory Turns comes when you segment it by ABC classification, by storeroom, by commodity group, by equipment criticality. This reference explains why and tells you what to do next.
The reference also covers Part Stockout Rate, the metric you have to watch alongside turns. Turns going up and stockouts staying flat means you reduced waste. Turns going up and stockouts climbing means you cut too deep. Always report both together.
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This benchmark tells you where you stand. The full Maximo KPI Guide: Inventory Turns covers the complete implementation: building the query in Maximo, segmenting by ABC classification and storeroom, running the drilldown diagnostic from aggregate to root cause, setting up automated KPI tracking in KPI Manager, and building the business case with real dollar scenarios.