A dry-dock or repair scope that overruns rarely fails in the dock. It fails earlier — at the moment scope was assumed rather than tested. A doability gate is a short, deliberate review run before any yard is committed, whose only job is to return one of three answers: proceed, proceed with conditions, or not yet.
What the gate actually tests
- Vessel condition, not the asset record. What the steel, coatings, machinery and systems are really in — against what the file claims.
- Yard and dock reality. Dock dimensions and lift capacity against the vessel’s true docking condition; crane reach; berth access; the yard’s real track record on this class of vessel.
- Access, logistics and long-lead items. What has to be on the quay before the vessel arrives, and what simply cannot be sourced inside the window.
- Authority route. Which activities need Class, OEM or statutory acceptance, and whether that acceptance can realistically be obtained inside the schedule.
- Closeout evidence. What records, witnesses and certificates will close the job — defined now, not improvised at the end.
Why it prevents overruns
The gate converts assumptions into either confirmed facts or named risks with owners. A scope that passes is one an owner can hold a yard to against a single baseline. A ‘conditional’ scope carries its risks openly into the contract. A ‘not yet’ is stopped before money is committed to a window that was never achievable.
It costs days. It saves weeks.