Spare Parts Inventory Optimization for Multi-Site Manufacturers: How to Reduce Cost Without Increasing Risk

Introduction

Most multi-site manufacturers are carrying excess MRO inventory across their network – and still experiencing stockouts of critical parts.

In environments with $100M or more in MRO inventory, 10–20% is often tied up in duplicate or underutilized materials. At a conservative 20% carrying cost, that equates to millions in avoidable expense each year – without improving availability.

This is not a stocking problem. It is a visibility and decision-making problem across fragmented ERP and EAM systems, where inventory is managed at the site level but risk and cost are borne at the enterprise level.

Spare parts inventory optimization, at the enterprise level, aligns availability, cost, and risk across sites, systems, and procurement workflows. The goal is not to reduce inventory blindly, but to improve how decisions are made across a distributed network.

If you want to understand where excess inventory, duplication, and hidden risk exist in your environment, evaluate inventory behavior across your full network – not just a single site.

Book a call with Verusen to assess your current inventory posture and identify immediate optimization opportunities.

Key Challenges and Solutions

Fragmented Inventory Across ERP and EAM Systems

Enterprise manufacturers rarely operate on a single system instance. Instead, they manage inventory across:

• Multiple ERP systems such as SAP, Oracle, or Infor
• EAM platforms including Maximo or Hexagon
• Regional or plant-level data structures

This creates isolated inventory pools where:

• Identical materials exist under different descriptions
• Inventory cannot be easily shared across sites
• Procurement teams lack visibility into network-wide stock

The result is structural inefficiency rather than isolated error.

Solution

AI-driven data harmonization connects fragmented material records across systems without requiring full data standardization initiatives.

This enables:

• Identification of equivalent and duplicate materials
• Network-wide inventory visibility
• Cross-site inventory rebalancing

Duplicate Spare Parts Driving Working Capital Waste

Duplicate materials are one of the largest hidden drivers of excess inventory in multi-site environments.

In large MRO environments:

• 10–20% of materials are duplicates or near-duplicates
• Procurement teams unknowingly repurchase existing inventory
• Inventory accumulates across sites without reuse

Financial impact example

For a manufacturer with $100M in MRO inventory:

• 15% duplication = $15M in redundant materials
• At a conservative 20% carrying cost = $3M in annual waste

This does not include the additional cost of emergency purchases or downtime events.

Solution

Inventory optimization platforms identify duplicate and equivalent materials and quantify their financial impact.

More importantly, they enable action:

• Consolidation of duplicate materials
• Reuse of existing inventory across sites
• Reduction of future duplication through procurement visibility

Excess Inventory Without Improved Availability

A common misconception is that higher inventory levels reduce risk.

In practice, many organizations experience both:

• Excess inventory across the network
• Stockouts of critical parts

This occurs because inventory decisions are not aligned to:

• Asset criticality
• Real usage patterns
• Lead time variability

Solution

Optimization aligns inventory decisions with operational reality by incorporating:

• Criticality classification
• Usage history
• Lead time variability

This allows organizations to reduce excess inventory while improving service levels.

Procurement Decisions Without Inventory Context

Procurement teams are often evaluated on cost and availability, but operate without full visibility into existing inventory across the network.

This leads to:

• Unnecessary purchases
• Supplier fragmentation
• Increased working capital exposure

Solution

Integrating inventory intelligence into procurement workflows enables teams to:

• Check existing inventory before purchasing
• Identify cross-site availability
• Consolidate suppliers and reduce fragmentation

This shifts procurement from reactive purchasing to strategic inventory management.

Book a call with Verusen to see how procurement and inventory visibility can be unified across your environment.

Case Study: Global Mining Organization

A global mining organization operating across 17 sites faced significant challenges in spare parts inventory optimization.

Their environment included:

• Fragmented inventory data across multiple ERP systems
• No standardized parts criticality model
• Limited visibility into duplicate materials and excess stock
• Independent decision-making at each site

This resulted in excess working capital tied up in inventory while still exposing operations to downtime risk.

After implementing a unified inventory optimization platform, the organization achieved:

• $96.8M in identified inventory opportunity
• $550K in verified value within the first month
• Thousands of materials reviewed and optimized

The transformation was driven by:

• Standardized parts criticality across sites
• Identification and reduction of duplicate materials
• Cross-site inventory visibility and transfers
• Optimization of stocking policies aligned to operational risk

Inventory decisions shifted from isolated, site-level assumptions to coordinated, data-driven governance across the network.

This is the difference between managing inventory and optimizing it.

FAQs

Conclusion

Spare parts inventory optimization is not about reducing inventory in isolation. It is about improving how decisions are made across a complex, multi-site environment.

Organizations that succeed move from fragmented, site-level management to coordinated, network-wide optimization.

To understand how much excess inventory, duplication, and risk exist in your environment, book a call with Verusen and evaluate your current inventory strategy across all sites.