The 5 Biggest Cost Drivers in Industrial Maintenance, and How to Control Them

Maintenance has a reputation as a cost center, and its budget is usually set by someone outside the plant. Yet a large share of what maintenance spends is decided inside it, one spare part at a time: which part is kept, where it sits, what it costs, and whether anyone saw its end coming. Those are decisions the head of maintenance, the storeroom and procurement can make better. Here are the five drivers that cost the most, with what you control about each.

Downtime costs most where a critical spare is missing

Unplanned downtime is the most expensive hour in a plant. In its 2024 study of the true cost of downtime, Siemens put a lost hour at $36,000 in fast-moving consumer goods and $2.3 million at the top end, in automotive, for the world's largest manufacturers. Smaller plants lose less per hour, but they have fewer machines to fall back on.

What you control is how long the stop lasts once a part has failed. Mark the critical spares, the parts a line cannot run without, and let maintenance decide which they are, rather than turnover. Then make sure everyone can see where they are stocked, at sister plants as well. Much of the waiting happens in the part decision before the repair starts, which is the subject of why maintenance waits for the right part.

Stock in the wrong place is paid for twice

Stock is the cost nobody sees on the day it is bought. The storeroom holds parts nobody has drawn in years, while the part the line needs is out of stock, or sits on a shelf under a second article number where no one looks. The same part filed twice is bought twice, and its stock is split between two records that each look too low.

This driver is among the most controllable, and the teams that work on it see the result. In MaintainX's 2024 survey of maintenance teams, 58.9% of the facilities that brought down the cost of unplanned downtime credited better parts inventory management. Start with the duplicates: merge the records that are one part, and check every plant's stock before buying. Then go through what has not moved, part by part, with maintenance signing off what can go.

A price without a reference is a price you can't check

Spare parts are bought in small quantities from many suppliers, often in a hurry, and a price that has crept up over the years is hard to spot. A 2025 UK survey by RS Group and CIPS found that the average organization now uses 92 suppliers for maintenance, repair and operations purchases, up from 75 in 2023. Every extra supplier is one more price list that nobody compares.

What you control is the reference. Know what a part should cost before you accept a quote, and see where you buy one class of parts from more suppliers than you need. Many parts sold under a machine builder's number are made by someone else, and knowing that maker gives the buyer a second source to compare against.

Discontinued parts become emergency buys when nobody sees them coming

Machine builders and component makers retire products all the time, and a plant that runs for decades meets that day for many of its parts. When nobody sees it coming, the discontinued part shows up as a failure: an emergency buy at whatever price is asked, a used part from a broker, or a redesign done in a hurry.

What you control is when you find out. Track which parts in your machines are active, phasing out or obsolete, note the last-time-buy dates, and look for potential alternatives while there is still time to test them. A part replaced on your schedule is a planning task. The same part replaced on the machine's schedule is an emergency.

Knowledge that leaves with people takes the part search with it

Every plant has people who know which part goes where, and most plants are losing some of them. In the same MaintainX survey, skilled labor shortages were the top challenge to improving maintenance programs, named by 60% of respondents. When the expert retires, the knowledge of which valve fits the old press leaves too, and the next technician spends the shift searching instead of repairing.

What you control is whether that knowledge sits in people or in the records. Describe parts the same way, keep the manufacturer and the manufacturer part number on every record, and let technicians search the way they talk. That is what Partium Find is for. Type what you know: a few words, a function, part of a description. Find searches by meaning, not by exact naming.

Five maintenance cost drivers, five things to do this quarter

Each of the five comes down to one habit a plant can start this quarter:

• Mark the critical spares with maintenance, and make their stock visible at every plant.
• Merge duplicate records, and check every storeroom before you buy.
• Give every part you buy often a price reference.
• List the parts heading for obsolescence, with the dates that matter.
• Put the manufacturer and part number on every record, so anyone can find the part.

Most of them start from data the plant already holds. The trouble is that it is spread across the ERP, the storeroom's spreadsheets and the purchase history of several sites.

The part data behind four of the five decisions sits in one place

Partium Cockpit brings the first four of those decisions together. 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 the breakdown and the duplicate, the search no longer stops at one plant's storeroom. One search shows where the part is stocked, at every plant, so you find it before you buy it again. For the buyer, every quote gets its yardstick. Price Benchmark tells you what a part should cost, so every price you pay has a reference. And for the parts that will disappear, maintenance gets the warning while there is time. See if a part is active, phasing out or obsolete, so you plan for obsolescence instead of reacting to it.

To see these five drivers in your own parts data, book a demo and ask for the demo license on your own catalog.