- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 26 Nov 2020
Construction projects are often subject to delays, irrespective of whether the contractor is or is not to blame. A delay claim for one day (or however number of days are involved) means the construction scheduled for that day was not completed, which could have severe financial implications and adversely affect the project's progress.
Delay analysis identifies why delays occur on a construction project and the impact they are expected to have on the overall programme. The outcome of the analysis may lead to legal action brought by one party to the contract.
 Who is responsible
Not the contractor’s fault:
- Unusual weather conditions.
- Interruption in material supply, particularly if material is imported.
- Conflicting or missing information in contract documents.
- Failure to give the contractor possession of the site.
Irrespective of who is at fault, such delays may have a critical financial impact on the project. When they occur, they represent a deviation from the planned programme of work and the contractor may be able to seek a time extension to compensate for the delay. In this case, they can submit a claim to the client outlining the cause and reasons for the delay. The client (or an agent acting on behalf of the client) must then evaluate whether the claim is justified and whether the contractor is entitled to compensation. Analysing who is at fault for the delay is a highly complex process and one which may lead to disputes.
Delay analysis can be undertaken
- Prospectively: Predicting what effect the delay will have on the project’s progress, prospective analysis can be used before and after the effect of the delay has occurred.
- Retrospectively: Retrospective techniques evaluate the effect that the delay will have on the project but they can only be applied once the works have been completed.
- Contemporaneously: During the delay.
The Delay and Disruption Protocol of The Society of Construction Law sets out six methods of delay analysis:
- Impacted As-Planned Analysis.
- Time Impact Analysis.
- Time Slice Windows Analysis.
- As-Planned versus As-Built Windows Analysis.
- Retrospective Longest Path Analysis.
- Collapsed As-Built Analysis.
 Related articles on Designing Buildings Wiki
- Breach of contract
- Collateral warranty.
- Construction contract.
- Contract v tort.
- Contracts under seal v under hand.
- Letter of intent.
- Privity of contract.
- Retrospective longest path analysis.
- Rights of third parties.
 External references
Featured articles and news
Reviewing trends and projections.
Legislation will establish initiatives to move towards net zero.
How to document contractor employment status.
Tech tools to help manage people and space post-pandemic.
A style that ranges from mock Tudor to arts and crafts to the 'Wrenaissance'.
Free guide from Secured by Design.
BREEAM strategy for sustainability and the circular economy.
Free tool to improve the construction programming process.
Are buildings doing what they're supposed to be doing?
Cities with quick access to everything by foot or bike.
The pressures and pinch points of global destinations.
Making the case for a sustainable future.
Retrofit professionals now entitled to enter CIOB programme.
How, where, when and why stereotypes happen.