Spare-Part Availability vs Inventory Cost
Base spare-part holdings on criticality, lead time, and production consequence rather than vendor lists to balance capital efficiency with reliability risk.
CyberTRIZ analysis · GreenFieldIndustrialProjects contradiction CSO030 · one of 8,235 worked contradictions published by CyberTRIZ.AI
Regulations
Business Context
Large spare-parts inventories reduce exposure to equipment failures during start-up but consume capital and storage resources. Limited inventories reduce cost but can create prolonged outages when critical components fail.
Green Field Industrial Projects TRIZ Resolution
Determine spare holdings according to equipment criticality, failure probability, lead time, interchangeability, and production consequence. Use shared, supplier-held, or rapidly accessible inventory for appropriate items instead of stocking every possible component on site.
Applicable TRIZ Principles
Principle 1 – Segmentation differentiates spare-parts strategies according to criticality.
Principle 6 – Universality uses common and interchangeable spares across compatible equipment.
Principle 11 – Beforehand Cushioning positions protection against high-consequence failures before operation.
Expected Outcome
Higher critical-spare availability
Lower unnecessary inventory
Reduced start-up downtime
Better working-capital efficiency
Decision Indicators
Early indicators include:
Large spare inventories coexist with shortages of critical components.
Spare holdings are based mainly on vendor recommendations.
Long-lead critical parts are unavailable.
Similar equipment uses unnecessarily different spares.
Inventory value grows without measurable reliability benefit.