The five dates that matter in a construction programme
A construction programme can run to hundreds of lines. For a client, only a handful of dates really tell you whether the project is on track.
A construction programme can be a daunting document to be handed. A detailed one runs to several hundred activities, and while you are welcome to work through it line by line, you should not have to in order to see whether your project is on track.
You do still need to keep the contractor to time, and that comes down to a handful of things rather than the whole document. The sections below set out what to watch.
1. Practical completion
This is the date the building is complete enough for you to use and take it back. Everything else on the programme exists to serve it, which is why you should find it first and then watch it more closely than anything else. If it moves, you want to hear about it straight away, and you want to understand why. It also helps to know what practical completion actually covers. It is the point where the building is usable and the contractor hands it back, and a defects period runs on afterwards for putting right the snags that only show once the building is in use.
2. The start on site
Until the contractor is genuinely mobilised, with hoarding up, welfare in and the first works underway, the programme is still only a forecast. It describes what is meant to happen, and does not yet record what actually has. This point is easy to overlook, but it matters. A start date that keeps quietly slipping is often the earliest sign that something further upstream is not yet ready.
3. The long-lead items
Every project has a few elements that take a long time to procure, such as a curtain-walling package (the glazed external skin), lifts, switchgear (the main electrical distribution gear) or anything bespoke. These need ordering weeks or even months before they can be installed. A good programme sets out the order dates alongside the installation dates. If an order date passes and the order has not been placed, the installation date is already at risk, whatever the Gantt chart continues to show. Ask to see the procurement schedule that sits behind these items, so the order dates stay visible and get tracked rather than buried in the body of the programme.
4. Your own decision dates
A programme does not place obligations on the contractor alone. It usually assumes that you, the client, will make certain decisions on finishes, layouts and sign-offs by set dates. These are easy to miss, precisely because they are yours to deliver and sit quietly among the contractor’s commitments.
A late client decision is one of the most common causes of delay, and one of the most avoidable. Look for your own dates on the programme and treat them with the same seriousness as any other deadline.
5. The critical path
Not every delay carries the same weight. Some activities have slack built into them. Others sit on the critical path, where any slippage pushes completion back day for day. You do not need to trace that path yourself, as it is one of the things your project manager is there to do. What you should do is ask, at every progress meeting, whether you are still on the critical path and whether it has moved. If it has moved, ask what caused it and what is being done to bring it back, so the update comes with a plan and a reason.
What this looks like in practice
A useful progress report takes the full programme and turns it back into those few numbers, showing the completion date, whether it has changed since the last report, and the one or two issues that now threaten it. If your reporting does not give you that, it is entirely reasonable to ask for it.