Storeroom & MRO Materials Management
Excessive spare parts trap working capital and inflate carrying costs, while stockouts cause devastating emergency downtime. SMRP KPI metrics balance storeroom liquidity against maintenance service level.
Intermediate Category: Spares & MRO Inventory • ~5 min read
MRO Inventory KPI Dashboard
Measure MRO storeroom efficiency and uncover inactive inventory cash drag.
Q:
What are the core SMRP storeroom inventory benchmarks?
Under SMRP Pillar 5: (1) Inventory Turns = Annual Issues / Avg Inventory (World-class: 1.5 - 3.0+); (2) Stockout Rate = Stockouts / Pick Requests (World-class: < 1.5%); (3) SLOB Ratio = Obsolete Value / Total Value (World-class: < 10%); (4) Carrying Cost = 20% to 25% of inventory value annually.
Storeroom Figures
Inventory Turns
1.41×
Typical
Days On Hand (DIOH)
258.9 d
Working capital velocity
Service Level
98.5%
1.5% stockouts
SLOB Ratio
12.9%
Excessive (<10% target)
Annual Inventory Holding Cost
$187,000 / yr
Cost of capital, shrinkage, tax, and insurance tied up in parts.
Potential SLOB Working Capital Release
$77,000
Estimated net cash recovered by returning or liquidating obsolete spares.
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Engineering & Regulatory Notice: The calculations, projections, and failure models provided in this suite are for engineering estimation and educational purposes. Verify all calculations and assumptions independently before making operational, equipment replacement, safety-critical, or regulatory compliance decisions.
Recommended Next Steps in Reliability Workflow
Spares & MRO Inventory
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