Agreement for the acceleration of construction works
Generally it is the client that requires acceleration of construction work. A client might be anxious that its building is handed over earlier than is set out in the contract or, where the contractor has been allowed extensions of time, earlier than the revised completion date.
For more information, see Acceleration of construction works.
 Contractor’s acceleration proposal
Before instructing the contractor to accelerate the works, there is a negotiating period, sometimes within a time frame stipulated in the construction contract. The contractor will put together a proposal that should include:
- Additional resources of manpower, plant and materials directly employed or subcontracted.
- The revised methodology and actions to be taken to achieve the accelerated date. This might include off-site prefabrication, extra scaffolding, temporary weatherproofing and so on.
- A revised programme with target intermediate dates by which progress can be measured. This might include proposals for phased completion if this is advantageous to the client.
- A statement on working hours on and off site, including weekends, holidays, night working and shift working if applicable.
- Additional supervision and any other increased costs for items categorised as preliminaries.
- Any concessions made by the client to assist the programme which might include:
- Changes to design or specification (for example standardisation replacing bespoke solutions)
- Reduction in scope (for example transferring work to a separate post-contract agreement for occupational works).
- The terms of settlement of all outstanding claims. This will include payment that might be linked to achieving the revised programme milestone dates.
 Client’s assessment of the acceleration proposal
The client’s consultant team should be asked to prepare a report on the contractor’s acceleration proposals, including a risk assessment of matters that may impede the contractor in achieving the revised programme.
The cost consultant in particular should comment on the validity of the detailed prices set out in the contractor’s proposal. The design team should comment on any proposed changes to the design or specification.
The client and consultant team might want to re-assess exactly how risk should be allocated in the work to be undertaken and whether any changes to the original contract might be appropriate. For instance a reduction in the first month of liquidated and ascertained damages might lead to a reduction in the sum of money the contractor has put in their price for risk in case of failure to meet the revised completion date. At the opposite extreme, a set of one-off bonus payments for each milestone achieved can encourage the contractor to go flat out, spending contingency money to collect the bonus payments.
 The agreement
It is advisable to have an agreement drawn up by a lawyer reflecting the outcome of negotiations. It is usual for acceleration agreements to be treated as an addendum to the building contract. As such it is advisable to have it drafted by the legal team that put together the original contract documents so that inconsistencies and ambiguities are avoided.
The agreement must also include details of:
- What happens if the contractor fails to implement some or all of the measures in its proposals.
- What happens if the contractor fails to meet intermediate targets and/or the completion date.
- The points at which each payment is due.
- Changes required to the existing contract documents to accommodate the acceleration agreement including any changes to design or specification.
- The treatment of retention in respect of acceleration, claims and bonus payments.
 Related articles on Designing Buildings Wiki
- Acceleration of construction works.
- Construction contract.
- Contractor's master programme.
- Critical path method.
- Design web.
- Earned value.
- Fast track construction.
- Gantt chart.
- Information release schedules.
- Key performance indicators.
- Lead times.
- Pareto analysis.
- Pre-construction information.
- Procurement route.
- Programme consultant.
- Progress in construction.
- Project crashing.
- Project programme.
- Scheduling construction activities.
- Time management of construction projects.
Featured articles and news
We interviewed CEO Andrew Carpenter about the rising popularity of timber, Grenfell, the future of 'plyscrapers', and more.
Can you pump heavyweight concrete through 500 m of 125 mm pipeline? Andrew Turner discusses the challenges at Crossrail.
DRAFT technical manual for BREEAM UK Non-domestic New Construction 2018 manual open to comments.
What is a certificate of non completion? Find out with this introductory article.
Read about the launch event for our major new report about the worrying and widening construction knowledge gap.
We've analysed 6 million pieces of data to reveal that the knowledge framework underpinning the construction industry is no longer fit for purpose.
Retrofitting traditional buildings depends on understanding how they differ from modern construction.
The theme for BSRIA's 2017 Briefing is 'Solutions to Tomorrow’s Challenges in Today’s Buildings'.
Dealing more than 1,700 consultations was just one of last year’s tasks for the Gardens Trust.
Read about the history behind one of California's most iconic buildings, the Griffith Observatory.
ICE examine just how close we are to providing subsidy-free low carbon electricity.
Have a look at MAD Architects' design proposal for renovating Montparnasse Tower into a concave mirror.