Negative lag
Lag is: ‘…the minimum necessary lapse of time between the finish of one activity and the finish of another overlapping activity.' Ref The Society of Construction Law Delay and Disruption Protocol, 2nd edition, published in February 2017 by the Society of Construction Law (UK).
The CIOB Planning Protocol 2021 (CIOB PP21), a technical information sheet published by the Chartered Institute of Building (CIOB) in February 2021, defines negative lag as: ‘An overlap between activities / milestones by way of logic with a duration of less than zero resulting in a degree of parallel working.’
[edit] Related articles on Designing Buildings Wiki
- Accepted programme.
- Activity schedule.
- As-built programme.
- Contractor's master programme.
- Contractor's working schedule.
- Critical path.
- Design programme.
- Lag.
- Negative float.
- Programme for building design and construction (project programme).
- Programme.
- Schedule.
- Short period programme.
- Tender works programme.
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
Cut electricity bills to power growth
Coalition sends joint letter to the Chancellor.
Gasholders: a history in pictures. Book review.
Recognition, influence and growth
SocEnv identifies three strategic pillars in new strategy to 2045.
Discover the future of roofing, cladding and insulation.
New guidance for professional practice, cultural change and regulation in social housing.
The heritage of nuclear and conventional power stations.
New measures to stop people being ripped off
Government to protect families from cowboy builders and aggressive bailiffs.
New Futurebuild showcase brings an innovation-first approach.
National Planning Policy Framework
Understanding the 2026 changes.
ECA's public affairs priorities
Member consultation opens to shape priorities for 2027 to 2030.
Dutyholder responsibilities from 1 July 2026.
Where performance meets practice
The Building Envelope Stage at UKCW Birmingham.