What Should a COO Own?

Ask three businesses what their COO is accountable for and the answers rarely match. In one, the COO effectively runs the whole business under the MD's title. In another, the COO owns a single function that could have been called Operations Director. In a third, the role is a catch-all for everything the MD does not want to do personally.

That inconsistency is the single biggest cause of COO appointments that stall in the first year. The role is not badly served by the market — it is badly defined before the market is even approached.

The five things the role must own

Strip away the variation between businesses and five areas of accountability remain constant wherever a COO title is used properly. If several of them sit elsewhere, the business does not have a COO — it has an Operations Director with an inflated title.

Delivery capacity is the anchor

Every other part of the role exists in service of one outcome: the business can reliably deliver what it has promised, at the volume it needs to, without heroics. A COO who cannot answer, with evidence, whether current capacity matches next year's sales plan is not yet in control of the role.

This is also where the boundary with sales is tested hardest. The COO does not set the revenue plan, but they are accountable for saying, before commitments are made, what the operation can and cannot support — and for building the capacity ahead of demand rather than reacting to it after the fact.

Supply chain as a strategic asset, not a purchasing function

In many mid-market businesses, supply chain is treated as transactional procurement — getting the best price on the day. Under a COO, it should be treated as a resilience question: single points of failure, lead-time risk, currency and cost exposure, and the ability to flex volume up or down without breaking delivery.

• Supplier concentration and dependency risk
• Lead times against the sales cycle and seasonal demand
• Cost volatility and the mechanisms used to manage it
• Contingency and dual-sourcing for critical inputs
• Alignment between procurement decisions and the quality standard actually required

Quality and safety are non-negotiable ownership

Quality failures and safety incidents are usually the fastest way an operational gap becomes a commercial and legal one. A COO owns the standards, the audit and reporting cadence, and the authority to stop or change a process that is producing recurring failures — even where that is commercially inconvenient in the short term.

An operations leader who cannot say no to a delivery date on quality or safety grounds does not really own quality or safety.

Systems and process design: the least visible, most valuable part

Many operational problems that look like people problems are actually process problems — work that depends on one person's memory, handoffs with no clear owner, or reporting that tells management what happened weeks after it mattered. A COO owns the design of how work moves through the business, and the management information that makes performance visible in near-real time.

This is where COO appointments create lasting value beyond any single hiring cycle: a well-designed operating model survives the next reorganisation, the next site opening and the next system change, because it was built around principles rather than around one person's way of working.

The operational cost base, not the whole P&L

A COO owns the cost of delivering — labour productivity, capacity utilisation, waste, overtime, expediting costs and the operational elements of the cost of goods sold. They do not usually own pricing, sales cost, or the capital structure of the business, though they should be a credible voice in discussions about all three.

What the COO should not own

Overloading the remit is as damaging as leaving it vague. A COO who is also accountable for the commercial plan, the board relationship and every function that is not finance is, in practice, doing the Managing Director's job without the title, the pay or the external accountability that comes with it.

How ownership changes with the engagement model

The five core areas do not change between a permanent, interim and fractional COO. What changes is time horizon and depth. A permanent COO owns all five indefinitely and builds the operating model for the long term. An interim COO typically owns a defined mandate — stabilise delivery, integrate an acquisition, cover a departure — for a set period. A fractional COO usually owns direction, standards and the design of the operating model, with day-to-day site or shift management remaining inside the business.

A short test for any draft COO job description

1. 01Can the role redesign a process or supplier relationship without needing sign-off for every change?
2. 02Does the role own the capacity plan against the sales forecast, or only react to it?
3. 03Is there named authority to halt a delivery on quality or safety grounds?
4. 04Is the boundary with the Managing Director written down, or assumed?
5. 05Does the role report to someone who can actually unblock investment decisions?