What buying availability actually means

Under a traditional maintenance contract, the client buys hours and spares. If the equipment fails, they pay for the repair. Under an availability contract, they buy an outcome: the asset must be available for an agreed percentage of the time, and if it is not, the supplier takes a penalty.

The difference looks contractual and is operational. It completely changes the incentives of whoever maintains the equipment.

The incentive reverses

Under a time-and-materials contract, a supplier earns more when the equipment fails more. Nobody would say so out loud, but the price structure says it for them. Under an availability contract, every failure is a cost to the supplier, which is why they invest in catching it early: predictive monitoring stops being an add-on service to be sold and becomes a defence of their own margin.

Four conditions it does not work without

A badly written availability contract generates more conflict than the arrangement it replaces. These are the conditions that, in our experience, separate one that works from one that ends in arbitration.

• A measured baseline. Committing to 99.4 % without knowing where the asset stands today is a gamble, not a contract.
• A definition of unavailability agreed event by event, with the exclusions written down before signing.
• Measurement both parties see in real time, from the same data source.
• A term long enough to contain at least one full major-maintenance cycle.

What happens to the staff

The question that comes up most is what happens to the existing maintenance team. In most of the transitions we have run, keeping them was the better decision: they know the asset, they know its quirks, and bringing them across cuts the learning curve from months to weeks. What changes is not the people; it is who the indicator reports to.

When it is the wrong instrument

An availability contract makes no sense on an asset at the end of its life, nor on one whose failure mode depends on a variable the operator does not control — raw material quality, say, or the stability of the grid. In those cases the price of the risk climbs until it costs more than carrying it in-house.

If the supplier cannot influence the cause of the failure, they will still charge for carrying it. And they will charge well.

The instrument works when the risk can be managed by whoever carries it. That is the whole rule.