A spare parts inventory optimization project can reduce stock and release cash. The harder question is what happens next.
If the decisions that created excess inventory remain unchanged, stock can build up again.
New parts are added, old settings stay in the system, and people make exceptions to protect operations. The project may have delivered its target, but the organization has not necessarily changed how it manages inventory.
Reducing inventory is a project outcome. Maintaining better inventory performance is an organizational capability.
It is often possible to identify parts that appear to have more stock than the business needs. Demand may be low, a part may have become obsolete, or several items may serve a similar purpose.
But a spreadsheet cannot settle every stocking decision. A part with little demand may still protect against a serious operational consequence. A long lead time may matter, but it does not automatically mean more stock is the right answer. The decision also depends on equipment needs, supply options, repair possibilities, cost, and the consequences of being without the part.
A good review brings those factors together. A lasting improvement also gives people a way to make those decisions consistently after the review is finished.
Inventory levels reflect many decisions made over time. Some are visible in the stock record; others are embedded in the way the organization works.
ERP settings may continue to trigger replenishment after demand patterns or operating conditions have changed. Criticality classifications may be incomplete or interpreted differently by different sites. Policies may be vague, out of date, or disconnected from day-to-day decisions.
Stakeholder behavior matters too. A planner may increase a setting after a stockout. Procurement may buy more to meet a supplier’s minimum order.
Maintenance may request extra stock to reduce the risk of delay. Each decision can seem reasonable in isolation. Without shared rules and review, the combined effect can be higher inventory and inconsistent practices.
Stocking decisions are not just an inventory planner’s responsibility. They bring together operational consequence, maintenance need, supply risk, and cost.
That means the rules need input from the people who understand those consequences. Maintenance, engineering, procurement, inventory teams, and finance may each hold part of the information needed to make a sound decision.
A useful policy makes the decision process clear. It explains what information to consider, who is responsible, when an exception is justified, and how that exception will be reviewed. It also gives people a consistent way to handle new parts, changes in equipment or supply, and stock that no longer has a clear purpose.
The policy does not need to remove judgment. It should make judgment visible and consistent.
A policy can be approved and still have little effect if no one checks how it is being used.
Governance provides that ongoing attention. It may include reviewing exceptions, monitoring changes to key ERP settings, checking whether criticality information is current, and assigning responsibility for decisions that cross functional boundaries.
The aim is not to create reporting for its own sake. It is to spot when decisions are drifting and give the right people a chance to respond before old patterns become routine again.
During a project, a team may have dedicated time, specialist analysis, and senior attention. Once that team disbands, the organization’s regular responsibilities take over.
If people have not learned how to apply the decision rules, if system settings are not maintained, or if no one owns the exceptions, the improvement may depend on a few individuals who were involved in the project. When they move on, the process can weaken.
That is why capability needs to develop alongside cash release. People need to understand not only which stock levels changed, but why they changed and how to make similar decisions in the future.
A lasting optimization effort should leave the organization better able to manage the next decision. Can the team explain why a part is stocked?
Are new requests assessed consistently? Are exceptions recorded and reviewed? Do responsibilities remain clear when conditions change?
These are practical tests of whether the work has become part of the organization’s way of operating.
The inventory reduction may be the most visible result. But sustained performance depends on the decisions, policies, system controls, and shared responsibilities that follow. When those are in place, the organization is better prepared to maintain the improvement—and to make the next one.
If this resonates with you, it is time to take action. Start here >>> Review Your Options.
Posted by Phillip Slater