MRO Supply Chain Risk in Mining and Oil and Gas

In asset-intensive industries like mining and oil and gas, the supply chain that keeps you running isn't the one that brings in raw materials, it's the one that brings in spare parts. MRO, short for maintenance, repair and operations, covers the components, consumables and equipment that keep physical assets working: the pump seal, the bearing, the specialised valve. It rarely gets the attention production supply chains do, yet in these industries it carries some of the highest-stakes risk of all, because a single missing part can idle an asset worth millions a day. Here's what makes MRO supply chains risky, and how to manage them.

What makes MRO supply chains risky

Downtime cost dwarfs part cost. The defining feature of MRO risk is that the value at risk has almost nothing to do with the price of the part. A cheap component can shut down a haul truck, a processing line or a rig, so the real exposure is the cost of downtime, which can run to hundreds of thousands or millions a day.

Unplanned, spiky demand. You can't fully predict which part will fail or when. MRO demand is intermittent and hard to forecast, so classic inventory logic built for steady consumption breaks down.

Long-tail, specialised and obsolete parts. Asset-intensive operations run huge catalogues of low-volume, highly specific spares, many for ageing equipment. Some are obsolete or made by a single OEM, so replacement is slow or impossible off the shelf.

Single-source and OEM dependency. Critical spares are often available only from the original equipment manufacturer, creating single points of failure with real pricing and lead-time power over you.

Remote locations and long lead times. Mines and rigs are often far from anywhere, so even an available part can take days or weeks to arrive, turning a small failure into extended downtime.

How to manage MRO supply chain risk

MRO is where value-at-risk thinking matters most, because part cost is a terrible guide to what to protect.

Rank spares by downtime value at risk, not by cost or usage. The question isn't how much a part costs or how often it's used; it's how much it would cost you if the asset it protects went down and the part wasn't there. Criticality-rank the catalogue on that basis. Map dependency and obsolescence for critical spares. For the parts that matter most, know the OEM and sub-tier source, and flag obsolescence risk early, so you're not discovering a part is unavailable when the asset is already down. Position inventory and sources deliberately. Stock the critical, long-lead, single-source spares close to the asset, and qualify alternates or repair options where you can, focusing spend where downtime exposure justifies it. Model failure and disruption scenarios. Rehearse the failures that would hurt most and the supply disruptions that would delay a fix, so your stocking and sourcing strategy is tested, not assumed. Monitor supplier and obsolescence signals. Watch the health of your critical OEMs and the lifecycle of key parts, so deterioration or discontinuation is caught early. Decide defensibly. Base what-to-stock-where decisions on the causal link between a part, an asset and its downtime cost, so you can justify the working capital tied up in spares rather than guessing.

In mining, oil and gas and other asset-intensive industries, MRO supply chain risk is really uptime risk, and it rewards a value-at-risk mindset more than almost any other supply chain. Rank by downtime, protect the critical few, and decide on cause. For the underlying approach, see our guide to supply chain risk management, and for the single-source exposures that dominate critical spares, single-source dependency.