Parts Intelligence
Spare parts inventory management: the right parts on the shelf, and no more
Every storeroom has the same paradox: shelves full of parts nobody draws, and the one part a breakdown needs missing. Spare parts inventory management is how a plant gets out of it: deciding what is critical, stocking it to the right level, clearing dead stock safely, sharing stock across plants and planning for parts that are being discontinued.
What spare parts inventory management covers
Spare parts inventory management decides which spare parts to hold, how many, where, and for how long, so the plant keeps running without tying up more capital than it needs. It is one part of spare parts management, and it does not work like production stock.
A production material is bought against a forecast and used up on schedule. A spare part is held against a breakdown. It may sit for ten years and still be the one part that matters, so how often a part moves says little about whether it should be on the shelf.
The boundary is the CMMS and the ERP. They book the issue at the counter, count the bins and run the reorder. This page is about the decisions behind the numbers they run on.
Four teams share those decisions. Maintenance owns the store and decides what is critical. The storeroom keeps the records and the levels. Procurement buys and sees the capital. Controlling asks why the stock is so high. The criticality your team sets outranks the model, so a spare the plant cannot run without is not flagged as stock to cut.
You keep your systems. Your ERP stays the system of record. Partium Agent reads from it and writes back what your team decides.
Five spare parts inventory management best practices
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Decide what is critical
Ask what happens when the part is missing
Criticality is not how often a part moves. It is what happens when it is missing: a safety risk, a line that stops, a part that takes weeks to arrive. Maintenance decides it, part by part, and it outranks every other rule on this page. Where turnover decides instead, the slow critical spare is the first one cleared.
In Partium Cockpit, the criticality your team sets travels with every stock figure:
Dead stock and overstock, part by part, with the capital tied up in each and its criticality.
Read more: Identifying Critical Spare Parts by What Happens When One Is Missing
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Stock to the right level
Set the level by the part, not by habit
The right level depends on the part. Sort the store by value and by how regularly each part is drawn, then set a minimum and a maximum for each, with the lead time weighed in: a part that arrives tomorrow needs a smaller buffer than one that takes twelve weeks. Review the levels when lead times change, not once a year. Where levels are set by habit, the store runs out of the parts with long lead times and fills up with the ones that arrive in a day.
Levels come from the ERP’s reorder settings, so the first step is seeing where they no longer fit. Your team then decides which to change.
Read more: Spare Parts Lead Times: Check Today’s Before You Promise a Date · The 5 Biggest Cost Drivers in Industrial Maintenance, and How to Control Them
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Clear dead stock, safely
Sort it before you clear it
Dead stock is stock nobody has drawn for years. Before any of it goes, sort it by why it stopped moving: the machine is gone, the part was replaced, it was over-ordered, or it is critical and waiting for its breakdown. Only the first three go, and maintenance signs the list. Clearances that skip the sorting scrap the last critical spare, and the fear of doing that is why many stores clear nothing at all.
In Cockpit, this is Inventory Optimization:
Shows the capital tied up in stock nobody draws, part by part.
Your shelves hold cash in dead stock. Cockpit shows how much, part by part, and your team decides what goes.
Read more: Dead Stock in Spare Parts: Sort It Before You Clear It
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See and share stock across plants
Find it on a sister plant's shelf before you buy it
Most companies with several plants hold the same slow spares in each of them, and still wait days for a part a sister plant has on the shelf. Good practice is one view of every plant’s stock, so a part is found before it is bought again, and stock shared, centralised or pooled where that makes sense. Stock one plant doesn’t need is the part another plant is about to order.
Inventory Optimization covers this across plants:
Finds the plant that needs stock another plant holds.
Share stock, centralize it or pool demand across your plants. It starts with the search. One search shows where the part is stocked, at every plant, so you find it before you buy it again. For maintenance and the storeroom, Maintenance & MRO shows the rest.
Read more: From Reactive Response to Proactive Parts Decisions
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Plan for parts that are being discontinued
The opposite case to dead stock
A discontinued part is the reverse of dead stock: the shelf may hold the last ones there will ever be. Know which parts are active, phasing out or discontinued, with the date that matters, whether that is an NRND notice, a product change notice or a last-time buy. Then test a potential alternative in time, and let maintenance or engineering approve it before it goes on the shelf. Where nobody tracks this, the notice is found during the breakdown. See which parts are running out, with the date that matters, while there is time to act.
In Cockpit, this is the Obsolescence Monitor:
Gives the date that matters, while there’s time to plan.
Names potential alternatives for parts heading for obsolescence.
Read more: How to Find Obsolete Spare Parts Before a Failure Finds Them · Lifecycle in the Workflow: NRND, PCNs and Last-Time Buys · Form, Fit, Function: The Discipline Behind Approved Alternates
Where to start: four steps
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List what has not moved.
Every part nobody has drawn in three years or more, with its value.
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Let maintenance mark what is critical,
before anything on that list is cleared.
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Check the other plants first.
For the rest, ask whether a sister plant needs it before anything is scrapped.
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See it on a catalog.
Book a demo on our demo catalog or a sample of your own. Nothing to prepare.
What does dead stock cost to hold, and how much of it could go once maintenance has marked what is critical? Try it out for yourself in the ROI calculator.
One platform for the part, beside your ERP
Partium Cockpit is software for the teams who look after spare parts: maintenance and procurement. The dashboard shows what needs doing today, and the feature where you do it. For stock, that is Inventory Optimization and the Obsolescence Monitor.
Partium Agent runs beneath every feature of Cockpit and Find. You work in the product; Agent does the work underneath. For stock, one capability does most of the work. Substitutions & OEM Insight flags the parts heading for obsolescence and names potential alternatives while there is still time to plan.
More on Parts Intelligence. You buy Partium Cockpit, Partium Find, or both. Partium Agent comes with either and is not sold on its own.
Questions about spare parts inventory management
What is spare parts inventory management?
Deciding which spare parts a plant holds, how many, where and for how long, and keeping those decisions right as machines, suppliers and lead times change.
The criticality your team sets outranks the model, so a spare the plant cannot run without is not flagged as stock to cut.
What are critical spares?
Spare parts the plant cannot run without: a missing one stops a line, puts people at risk or takes too long to get. Maintenance decides which they are, part by part, by what happens when one is missing.
Dead stock and overstock, part by part, with the capital tied up in each and its criticality.
How much spare parts stock should a plant hold?
As much as the part’s criticality and lead time call for, and no more. Set a minimum and a maximum per part, with the lead time weighed in, and review them when lead times change.
Shows the capital tied up in stock nobody draws, part by part.
What is dead stock, and when can it go?
Stock nobody has drawn for years. It can go once you know why it stopped moving and maintenance has confirmed it is not critical; a part that is waiting for a breakdown stays.
Your shelves hold cash in dead stock. Cockpit shows how much, part by part, and your team decides what goes.
Can plants share spare parts stock?
Yes, once every plant’s stock is in one view. Then a part can move from a sister plant instead of being bought again, and slow spares can be held in one place for several plants.
Share stock, centralize it or pool demand across your plants.
Is a discontinued part the same as obsolete stock?
No. Obsolete stock is stock nobody needs any more. A discontinued part may still be needed, and the shelf may hold the last ones there will ever be, so it calls for a plan, not a clearance.
See if a part is active, phasing out or obsolete, so you plan for obsolescence instead of reacting to it.
See it on a catalog like yours
See it on our demo catalog, or on a sample of your own. There is nothing to prepare.