Design and build procurement route - Revision history

Designing Buildings at 11:37, 20 February 2025

2025-02-20T11:37:12Z

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		+	\|
		+	Key takeaways:
		+
		+	The Design and Build (D&B) procurement route is a project delivery method where a single contractor is responsible for both design and construction. This approach streamlines project management, often leading to faster completion and better cost certainty. It is the most commonly used procurement method in the UK, accounting for over 50% of projects. While D&B offers a single point of responsibility, it can limit client control over design details. It is ideal for projects where speed, efficiency, and cost control are priorities, but may not suit those requiring highly customised design input.
		+	\|}

	= What is the design and build procurement route? =		= What is the design and build procurement route? =

Designing Buildings at 06:59, 28 May 2024

2024-05-28T06:59:10Z

← Older revision		Revision as of 06:59, 28 May 2024
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−	[[File:ConstructionSafety.jpg]]	+	[[File:ConstructionSafety.jpg\|link=File:ConstructionSafety.jpg]]

	= What is the design and build procurement route? =		= What is the design and build procurement route? =
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	= Notes =		= Notes =

−	~~NB:~~ A design and build contract may also be referred to as a contractor designed contract. This should not be confused with contractor's design portion.	+	* A design and build contract may also be referred to as a contractor designed contract. This should not be confused with contractor's design portion.
−		+	* 'Develop and construct' is a variation on design and build, in which most of the design is completed before the contractor is appointed. This avoids some of the potential problems of design and build, but also misses some of the opportunities.
−	~~NB:~~ 'Develop and construct' is a variation on design and build, in which most of the design is completed before the contractor is appointed. This avoids some of the potential problems of design and build, but also misses some of the opportunities.	+	* In the context of the UK Building Safety Act, a "design and build" approach refers to a project delivery method in which a single entity, typically a contractor or construction company, is responsible for both the design and construction phases of a building project. Under this approach, the client (building owner or developer) contracts with the design and build contractor to deliver the project from inception to completion. While the design and build approach offers several potential benefits, including accelerated project delivery, cost savings, and reduced project management burden for clients, it also presents certain challenges, such as potential conflicts of interest, limited client control over design decisions, and reliance on the contractor's expertise and capabilities. As such, the suitability of the design and build approach depends on the specific requirements, objectives, and constraints of each project.

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =

Designing Buildings at 08:28, 12 October 2022

2022-10-12T08:28:18Z

← Older revision		Revision as of 08:28, 12 October 2022
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		+	[[File:ConstructionSafety.jpg]]
		+
	= What is the design and build procurement route? =		= What is the design and build procurement route? =

−	Design and build is ~~a term describing~~ a procurement route in which the main contractor is appointed to both design and then construct the works described in the contract. ~~The contractor~~ is ~~responsible for~~ the ~~design~~, ~~planning, organisation, control and construction of~~ the ~~works~~ to the ~~employer’s requirements~~.	+	Design and build is a procurement route in which the main contractor is appointed to both design and then construct the works described in the contract. This is as opposed to the traditional procurement route, in which the client first appoints consultants to design the development and then a contractor is appointed to construct the works.

	Design and build can be seen as giving a single point of responsibility for delivering the entire project. Some clients, however, consider it is only appropriate for simple projects, where design quality is not the main consideration.		Design and build can be seen as giving a single point of responsibility for delivering the entire project. Some clients, however, consider it is only appropriate for simple projects, where design quality is not the main consideration.
−
−	~~This is as opposed to the traditional procurement route, in which the client first appoints consultants to design the development and then a contractor is appointed to construct the works.~~

	= How popular is the design and build procurement route? =		= How popular is the design and build procurement route? =
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	The traditional procurement was historically the most commonly used procurement route, but there has been an increasing trend for contractors to take a more significant role in setting up projects, making appointments and managing the entire project process. This began with the introduction of design and build, which became popular in the 1980s.		The traditional procurement was historically the most commonly used procurement route, but there has been an increasing trend for contractors to take a more significant role in setting up projects, making appointments and managing the entire project process. This began with the introduction of design and build, which became popular in the 1980s.

−	[https://www.rlb.com/europe/insight/getting-closer-to-your-supply-chain/ Procurement trends survey, getting closer to your supply chain], published by Ryder Levett Bucknall (RLB) in March 2022, ~~suggested~~ that design and build is now the most commonly-used procurement route.	+	[https://www.rlb.com/europe/insight/getting-closer-to-your-supply-chain/ Procurement trends survey, getting closer to your supply chain], published by Ryder Levett Bucknall (RLB) in March 2022, suggests that design and build is now the most commonly-used procurement route.

	{\|		{\|
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	= How does the design and build procurement route work? =		= How does the design and build procurement route work? =

−	The employer gives ~~the tenderers the ‘Employer’s Requirements’~~ setting out what they need from the project, and the contractors respond with ~~the ‘Contractor’s Proposals’~~, which include ~~the~~ price for the works.	+	The employer gives potential contractors their ‘employer’s requirements’ setting out what they need from the project, and the contractors respond with ‘contractor’s proposals’, which include a price for the works.

	The contractor can either be appointed to carry out all of the design work, or if the client wishes to have greater influence over the design, a concept design and outline (or performance) specification can be prepared by a consultant employed by the client, and then the contractor is appointed to complete the design and carry out the construction.		The contractor can either be appointed to carry out all of the design work, or if the client wishes to have greater influence over the design, a concept design and outline (or performance) specification can be prepared by a consultant employed by the client, and then the contractor is appointed to complete the design and carry out the construction.
Line 56:		Line 56:
	Design and build contracts can be awarded on a fixed price, lump sum basis, but price certainty is then dependent on not making any subsequent changes as these could prove to be expensive (as prices charged by the contractor for those changes will not be subject to competition).		Design and build contracts can be awarded on a fixed price, lump sum basis, but price certainty is then dependent on not making any subsequent changes as these could prove to be expensive (as prices charged by the contractor for those changes will not be subject to competition).

−	It is very important therefore that the client gives a great deal of consideration to the preparation of employer's requirements, and if they have not appointed their own design team, they may wish to appoint independent client advisers to help them do this. Similarly, if any designers appointed by the client are novated or switched to work for the contractor, the client may then wish to appoint independent client advisers to review contractor's design proposals, administer the contract and monitor works on site.	+	It is very important therefore that the client gives a great deal of consideration to the preparation of the employer's requirements, and if they have not appointed their own design team, they may wish to appoint independent client advisers to help them do this. Similarly, if any designers appointed by the client are novated or switched to work for the contractor, the client may then wish to appoint independent client advisers to review contractor's design proposals, administer the contract and monitor works on site.

	= What are the different types of design and build? =		= What are the different types of design and build? =
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	There are two main types of design and build:		There are two main types of design and build:

−	* Single stage design and build	+	* Single stage design and build.
−	* Two-stage design and build	+	* Two-stage design and build.

	== What is single-stage design and build? ==		== What is single-stage design and build? ==
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	In a two-stage process the contractor is first selected on the basis of a fee, preliminaries, overheads and profit. They then work with the design team (who may be employed either by the contractor or by the client at this stage) to develop the design, on the basis of which a fixed price is negotiated for the second stage; construction, when the design team may be novated to the contractor if the contractor does not already employ them.		In a two-stage process the contractor is first selected on the basis of a fee, preliminaries, overheads and profit. They then work with the design team (who may be employed either by the contractor or by the client at this stage) to develop the design, on the basis of which a fixed price is negotiated for the second stage; construction, when the design team may be novated to the contractor if the contractor does not already employ them.
		+
		+	For more information see: Two-stage tender.

	= When should the design and build procurement route be used? =		= When should the design and build procurement route be used? =

Designing Buildings at 08:21, 12 October 2022

2022-10-12T08:21:10Z

← Older revision		Revision as of 08:21, 12 October 2022
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	This is as opposed to the traditional procurement route, in which the client first appoints consultants to design the development and then a contractor is appointed to construct the works.		This is as opposed to the traditional procurement route, in which the client first appoints consultants to design the development and then a contractor is appointed to construct the works.
		+
		+	= How popular is the design and build procurement route? =
		+
		+	The traditional procurement was historically the most commonly used procurement route, but there has been an increasing trend for contractors to take a more significant role in setting up projects, making appointments and managing the entire project process. This began with the introduction of design and build, which became popular in the 1980s.
		+
		+	[https://www.rlb.com/europe/insight/getting-closer-to-your-supply-chain/ Procurement trends survey, getting closer to your supply chain], published by Ryder Levett Bucknall (RLB) in March 2022, suggested that design and build is now the most commonly-used procurement route.
		+
		+	{\|
		+	\|
		+
		+	\| Design and Build
		+	\| Traditional without Quants
		+	\| Traditional with Quants
		+	\| CM / MC
		+	\| Bespoke / Other
		+	\|-
		+	\| 2019 Survey
		+	\| 66%
		+	\| 22%
		+	\| 8%
		+	\| 2%
		+	\| 2%
		+	\|-
		+	\| 2021 Survey
		+	\| 56%
		+	\| 25%
		+	\| 12%
		+	\| 5%
		+	\| 2%
		+	\|-
		+	\| 2022 Survey
		+	\| 54%
		+	\| 32%
		+	\| 11%
		+	\| 1%
		+	\| 3%
		+	\|}
		+
		+	[Table published courtesy of RLB]

	= How does the design and build procurement route work? =		= How does the design and build procurement route work? =

Designing Buildings at 08:17, 12 October 2022

2022-10-12T08:17:34Z

← Older revision		Revision as of 08:17, 12 October 2022
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	* The benefit of the contractor’s experience during the design stage.		* The benefit of the contractor’s experience during the design stage.

−	= What are the of the design and build procurement route? =	+	= What are the disadvantages of the design and build procurement route? =

−	* ~~Client~~ may find it hard to prepare a sufficiently comprehensive brief	+	Disadvantages of the design and build procurement route include:
−	* ~~Client~~ has to commit to a concept design early	+
−	* Variations from the original brief can be difficult ~~to arrange~~ and expensive	+	* The client may find it hard to prepare a sufficiently comprehensive brief to ensure the design meets their requirements.
−	* ~~Harder~~ to compare tenders and determine if they offer value for money	+	* The client has to commit to a concept design early in the project development.
−	* Ease of fabrication may be prioritised above aesthetic quality	+	* Variations from the original brief can be difficult and expensive to arrange.
		+	* It can be difficult to compare tenders and determine if they offer value for money.
		+	* Ease of fabrication, speed and low cost may be prioritised by the contractor above aesthetic quality

	See also: Design and build - pros and cons.		See also: Design and build - pros and cons.
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	** NEC4		** NEC4
	** NEC4 DBO		** NEC4 DBO
		+
		+	= Notes =

	NB: A design and build contract may also be referred to as a contractor designed contract. This should not be confused with contractor's design portion.		NB: A design and build contract may also be referred to as a contractor designed contract. This should not be confused with contractor's design portion.

Designing Buildings at 08:15, 12 October 2022

2022-10-12T08:15:08Z

← Older revision		Revision as of 08:15, 12 October 2022
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−	~~Design~~ and build ~~is a term describing a~~ procurement route in which the main contractor is appointed to design and construct the works, as opposed to a traditional contract, where the client appoints consultants to design the development and then a contractor is appointed to construct the works.	+	= What is the design and build procurement route? =

−	The contractor is responsible for the design, planning, organisation, control and construction of the works to the employer’s requirements~~. The employer gives the tenderers the ‘Employer’s Requirements’ and the contractors respond with the ‘Contractor’s Proposals’, which include the price for the works~~.	+	Design and build is a term describing a procurement route in which the main contractor is appointed to both design and then construct the works described in the contract. The contractor is responsible for the design, planning, organisation, control and construction of the works to the employer’s requirements.

	Design and build can be seen as giving a single point of responsibility for delivering the entire project. Some clients, however, consider it is only appropriate for simple projects, where design quality is not the main consideration.		Design and build can be seen as giving a single point of responsibility for delivering the entire project. Some clients, however, consider it is only appropriate for simple projects, where design quality is not the main consideration.

−	~~The contractor can either be appointed~~ to ~~carry out all of~~ the ~~design work~~, ~~or if~~ the client ~~wishes~~ to ~~have greater influence over the~~ design~~, a concept design and outline (or performance) specification can be prepared by a consultant employed by~~ the ~~client,~~ and then ~~the~~ contractor is appointed to ~~complete the design and carry out~~ the ~~construction~~.	+	This is as opposed to the traditional procurement route, in which the client first appoints consultants to design the development and then a contractor is appointed to construct the works.

−	~~The contractor may use their own in-house designers to design the building, or they can appoint consultant designers, or the client's designers can be employed by the contractor to complete~~ the design ~~(either by novation or consultant switch).~~	+	= How does the design and build procurement route work? =

−	If the ~~contractor is not appointed at~~ the ~~outset of the project (so that~~ they ~~can contribute to the development of the design~~ from the ~~beginning)~~, ~~they may be appointed through a two-stage process. In~~ the ~~first stage~~, the ~~contractor is selected on~~ the ~~basis of a fee, preliminaries, overheads and profit~~.	+	The employer gives the tenderers the ‘Employer’s Requirements’ setting out what they need from the project, and the contractors respond with the ‘Contractor’s Proposals’, which include the price for the works.

−	~~They then work with the design team (who may be employed~~ either by the ~~contractor~~ or by the client ~~at this stage)~~ to ~~develop~~ the design, ~~on the basis of which~~ a ~~fixed price is negotiated for~~ the ~~second stage; construction~~, ~~when~~ the ~~design team may be novated~~ to the ~~contractor if~~ the ~~contractor does not already employ them~~.	+	The contractor can either be appointed to carry out all of the design work, or if the client wishes to have greater influence over the design, a concept design and outline (or performance) specification can be prepared by a consultant employed by the client, and then the contractor is appointed to complete the design and carry out the construction.

−	~~Design and build is one of~~ the ~~three procurement routes favoured~~ by the ~~government for publicly-funded projects, as it allows a fully integrated team~~ to ~~work together on~~ the ~~project from the beginning~~.	+	The contractor may use their own in-house designers to design the building, or they can appoint consultant designers, or the client's designers can be employed by the contractor to complete the design (either by novation or consultant switch).

	Design and build contracts can be awarded on a fixed price, lump sum basis, but price certainty is then dependent on not making any subsequent changes as these could prove to be expensive (as prices charged by the contractor for those changes will not be subject to competition).		Design and build contracts can be awarded on a fixed price, lump sum basis, but price certainty is then dependent on not making any subsequent changes as these could prove to be expensive (as prices charged by the contractor for those changes will not be subject to competition).
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	It is very important therefore that the client gives a great deal of consideration to the preparation of employer's requirements, and if they have not appointed their own design team, they may wish to appoint independent client advisers to help them do this. Similarly, if any designers appointed by the client are novated or switched to work for the contractor, the client may then wish to appoint independent client advisers to review contractor's design proposals, administer the contract and monitor works on site.		It is very important therefore that the client gives a great deal of consideration to the preparation of employer's requirements, and if they have not appointed their own design team, they may wish to appoint independent client advisers to help them do this. Similarly, if any designers appointed by the client are novated or switched to work for the contractor, the client may then wish to appoint independent client advisers to review contractor's design proposals, administer the contract and monitor works on site.

−	~~Appropriate:~~	+	= What are the different types of design and build? =

−	* Where there is a need to make an early start on site – can overlap design and ~~construction~~	+	There are two main types of design and build:
−	* Where the client wishes to minimise their risk – no responsibility for design	+
−	* For technically complex projects which can benefit from the contractor’s expertise	+
−	* Where the employer does not want to retain full control over the design development	+

−	~~What are the advantages of~~ design and build?	+	* Single stage design and build
		+	* Two-stage design and build

−	* Single point of responsibility for design and ~~construction~~	+	== What is single-stage design and build? ==
−	* Earlier commencement on site	+
−	* Early price certainty	+
−	* Benefit of contractor’s experience harnessed during design	+

−	What are the ~~disadvantages~~?	+	In the single-stage process the contractor is appointed under a single agreement to undertake the design and then construct the works. Single-stage tendering is used when all the information necessary to calculate a realistic price is available when tendering commences.
		+
		+	== What is two stage design and build? ==
		+
		+	In a two-stage process the contractor is first selected on the basis of a fee, preliminaries, overheads and profit. They then work with the design team (who may be employed either by the contractor or by the client at this stage) to develop the design, on the basis of which a fixed price is negotiated for the second stage; construction, when the design team may be novated to the contractor if the contractor does not already employ them.
		+
		+	= When should the design and build procurement route be used? =
		+
		+	The design and build procurement route should be used:
		+
		+	* Where there is a need to make an early start on site – as design and construction can overlap.
		+	* Where the client wishes to minimise their risk – as they have no responsibility for design
		+	* For technically complex projects which can benefit from the contractor’s expertise in the design stage.
		+	* Where the employer does not want to retain full control over the design development.
		+	* Where the client wishes to have a single point of responsibility.
		+
		+	= What are the advantages of the design and build procurement route? =
		+
		+	Advantages of the design and build procurement route include:
		+
		+	* A single point of responsibility for design and construction.
		+	* Earlier commencement on site.
		+	* Early price certainty.
		+	* The benefit of the contractor’s experience during the design stage.
		+
		+	= What are the of the design and build procurement route? =

	* Client may find it hard to prepare a sufficiently comprehensive brief		* Client may find it hard to prepare a sufficiently comprehensive brief
Line 42:		Line 62:

	See also: Design and build - pros and cons.		See also: Design and build - pros and cons.
		+
		+	= What types of contract can be used for the design build procurement route? =

	Design and build contracts include:		Design and build contracts include:

Designing Buildings at 08:15, 3 August 2022

2022-08-03T08:15:34Z

← Older revision		Revision as of 08:15, 3 August 2022
Line 57:		Line 57:

	NB: 'Develop and construct' is a variation on design and build, in which most of the design is completed before the contractor is appointed. This avoids some of the potential problems of design and build, but also misses some of the opportunities.		NB: 'Develop and construct' is a variation on design and build, in which most of the design is completed before the contractor is appointed. This avoids some of the potential problems of design and build, but also misses some of the opportunities.
−
−	~~[[File:DBWCTA_C_link_JCT_d_and_b_contracts_ebook.png\|link=https://hubs.la/H0Nm5lV0]]~~

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =

86.24.161.2: Undo revision 231178 by [[Special:Contributions/[IP address hidden]|[IP address hidden]]] ([[User talk:[IP address hidden]|talk]])

2022-05-17T23:00:55Z

Undo revision 231178 by [[Special:Contributions/[IP address hidden]|[IP address hidden]]] ([[User talk:[IP address hidden]|talk]])

← Older revision		Revision as of 23:00, 17 May 2022
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−	~~Desind~~ [[Constructing_Excellence_contract\|JCT Co]]d, but also misses some of the opportunities.	+	Design and build is a term describing a procurement route in which the main contractor is appointed to design and construct the works, as opposed to a traditional contract, where the client appoints consultants to design the development and then a contractor is appointed to construct the works.
		+
		+	The contractor is responsible for the design, planning, organisation, control and construction of the works to the employer’s requirements. The employer gives the tenderers the ‘Employer’s Requirements’ and the contractors respond with the ‘Contractor’s Proposals’, which include the price for the works.
		+
		+	Design and build can be seen as giving a single point of responsibility for delivering the entire project. Some clients, however, consider it is only appropriate for simple projects, where design quality is not the main consideration.
		+
		+	The contractor can either be appointed to carry out all of the design work, or if the client wishes to have greater influence over the design, a concept design and outline (or performance) specification can be prepared by a consultant employed by the client, and then the contractor is appointed to complete the design and carry out the construction.
		+
		+	The contractor may use their own in-house designers to design the building, or they can appoint consultant designers, or the client's designers can be employed by the contractor to complete the design (either by novation or consultant switch).
		+
		+	If the contractor is not appointed at the outset of the project (so that they can contribute to the development of the design from the beginning), they may be appointed through a two-stage process. In the first stage, the contractor is selected on the basis of a fee, preliminaries, overheads and profit.
		+
		+	They then work with the design team (who may be employed either by the contractor or by the client at this stage) to develop the design, on the basis of which a fixed price is negotiated for the second stage; construction, when the design team may be novated to the contractor if the contractor does not already employ them.
		+
		+	Design and build is one of the three procurement routes favoured by the government for publicly-funded projects, as it allows a fully integrated team to work together on the project from the beginning.
		+
		+	Design and build contracts can be awarded on a fixed price, lump sum basis, but price certainty is then dependent on not making any subsequent changes as these could prove to be expensive (as prices charged by the contractor for those changes will not be subject to competition).
		+
		+	It is very important therefore that the client gives a great deal of consideration to the preparation of employer's requirements, and if they have not appointed their own design team, they may wish to appoint independent client advisers to help them do this. Similarly, if any designers appointed by the client are novated or switched to work for the contractor, the client may then wish to appoint independent client advisers to review contractor's design proposals, administer the contract and monitor works on site.
		+
		+	Appropriate:
		+
		+	* Where there is a need to make an early start on site – can overlap design and construction
		+	* Where the client wishes to minimise their risk – no responsibility for design
		+	* For technically complex projects which can benefit from the contractor’s expertise
		+	* Where the employer does not want to retain full control over the design development
		+
		+	What are the advantages of design and build?
		+
		+	* Single point of responsibility for design and construction
		+	* Earlier commencement on site
		+	* Early price certainty
		+	* Benefit of contractor’s experience harnessed during design
		+
		+	What are the disadvantages?
		+
		+	* Client may find it hard to prepare a sufficiently comprehensive brief
		+	* Client has to commit to a concept design early
		+	* Variations from the original brief can be difficult to arrange and expensive
		+	* Harder to compare tenders and determine if they offer value for money
		+	* Ease of fabrication may be prioritised above aesthetic quality
		+
		+	See also: Design and build - pros and cons.
		+
		+	Design and build contracts include:
		+
		+	* [[JCT_Design_and_Build_Contract\|Joint Contracts Tribunal (JCT) DB 16]] (also JCT Major project contract and [[Constructing_Excellence_contract\|JCT Constructing excellence contract]]).
		+	* The Association of Consultant Architects ACA/2.
		+	* Government Contracts GC/Works 1 (single stage or two stage) (NB: GC Works contracts are no longer being updated by the government).
		+	* Institution of Civil Engineers (ICE) Design and Construct (this has now been withdrawn in favour of NEC3).
		+	* The New Engineering Contract (NEC) Engineering and Construction Contract
		+	** NEC3
		+	** NEC4
		+	** NEC4 DBO
		+
		+	NB: A design and build contract may also be referred to as a contractor designed contract. This should not be confused with contractor's design portion.
		+
		+	NB: 'Develop and construct' is a variation on design and build, in which most of the design is completed before the contractor is appointed. This avoids some of the potential problems of design and build, but also misses some of the opportunities.

	[[File:DBWCTA_C_link_JCT_d_and_b_contracts_ebook.png\|link=https://hubs.la/H0Nm5lV0]]		[[File:DBWCTA_C_link_JCT_d_and_b_contracts_ebook.png\|link=https://hubs.la/H0Nm5lV0]]

86.24.161.2 at 22:59, 17 May 2022

2022-05-17T22:59:45Z

← Older revision		Revision as of 22:59, 17 May 2022
Line 1:		Line 1:
−	Design and build is a term describing a procurement route in which the main contractor is appointed to design and construct the works, as opposed to a traditional contract, where the client appoints consultants to design the development and then a contractor is appointed to construct the works.	+	Desind [[Constructing_Excellence_contract\|JCT Co]]d, but also misses some of the opportunities.
−		+
−	The contractor is responsible for the design, planning, organisation, control and construction of the works to the employer’s requirements. The employer gives the tenderers the ‘Employer’s Requirements’ and the contractors respond with the ‘Contractor’s Proposals’, which include the price for the works.	+
−		+
−	Design and build can be seen as giving a single point of responsibility for delivering the entire project. Some clients, however, consider it is only appropriate for simple projects, where design quality is not the main consideration.	+
−		+
−	The contractor can either be appointed to carry out all of the design work, or if the client wishes to have greater influence over the design, a concept design and outline (or performance) specification can be prepared by a consultant employed by the client, and then the contractor is appointed to complete the design and carry out the construction.	+
−		+
−	The contractor may use their own in-house designers to design the building, or they can appoint consultant designers, or the client's designers can be employed by the contractor to complete the design (either by novation or consultant switch).	+
−		+
−	If the contractor is not appointed at the outset of the project (so that they can contribute to the development of the design from the beginning), they may be appointed through a two-stage process. In the first stage, the contractor is selected on the basis of a fee, preliminaries, overheads and profit.	+
−		+
−	They then work with the design team (who may be employed either by the contractor or by the client at this stage) to develop the design, on the basis of which a fixed price is negotiated for the second stage; construction, when the design team may be novated to the contractor if the contractor does not already employ them.	+
−		+
−	Design and build is one of the three procurement routes favoured by the government for publicly-funded projects, as it allows a fully integrated team to work together on the project from the beginning.	+
−		+
−	Design and build contracts can be awarded on a fixed price, lump sum basis, but price certainty is then dependent on not making any subsequent changes as these could prove to be expensive (as prices charged by the contractor for those changes will not be subject to competition).	+
−		+
−	It is very important therefore that the client gives a great deal of consideration to the preparation of employer's requirements, and if they have not appointed their own design team, they may wish to appoint independent client advisers to help them do this. Similarly, if any designers appointed by the client are novated or switched to work for the contractor, the client may then wish to appoint independent client advisers to review contractor's design proposals, administer the contract and monitor works on site.	+
−		+
−	~~Appropriate:~~	+
−		+
−	* Where there is a need to make an early start on site – can overlap design and construction	+
−	* Where the client wishes to minimise their risk – no responsibility for design	+
−	* For technically complex projects which can benefit from the contractor’s expertise	+
−	* Where the employer does not want to retain full control over the design development	+
−		+
−	~~What are the advantages of design and build?~~	+
−		+
−	* Single point of responsibility for design and construction	+
−	* Earlier commencement on site	+
−	* Early price certainty	+
−	* Benefit of contractor’s experience harnessed during design	+
−		+
−	~~What are the disadvantages?~~	+
−		+
−	* Client may find it hard to prepare a sufficiently comprehensive brief	+
−	* Client has to commit to a concept design early	+
−	* Variations from the original brief can be difficult to arrange and expensive	+
−	* Harder to compare tenders and determine if they offer value for money	+
−	* Ease of fabrication may be prioritised above aesthetic quality	+
−		+
−	~~See also: Design and build - pros and cons.~~	+
−		+
−	~~Design and build contracts include:~~	+
−		+
−	* [[JCT_Design_and_Build_Contract\|Joint Contracts Tribunal (JCT) DB 16]] (also JCT Major project contract and [[Constructing_Excellence_contract\|JCT ~~Constructing excellence contract~~]]).	+
−	* The Association of Consultant Architects ACA/2.	+
−	* Government Contracts GC/Works 1 (single stage or two stage) (NB: GC Works contracts are no longer being updated by the government).	+
−	* Institution of Civil Engineers (ICE) Design and Construct (this has now been withdrawn in favour of NEC3).	+
−	* The New Engineering Contract (NEC) Engineering and Construction Contract	+
−	** NEC3	+
−	** NEC4	+
−	** NEC4 DBO	+
−		+
−	~~NB: A design and build contract may also be referred to as a contractor designed contract. This should not be confused with contractor's design portion.~~	+
−		+
−	NB: 'Develop and construct' is a variation on design and build, in which most of the design is completed before the contractor is appointed. This avoids some of the potential problems of design and build, but also misses some of the opportunities.	+

	[[File:DBWCTA_C_link_JCT_d_and_b_contracts_ebook.png\|link=https://hubs.la/H0Nm5lV0]]		[[File:DBWCTA_C_link_JCT_d_and_b_contracts_ebook.png\|link=https://hubs.la/H0Nm5lV0]]

Designing Buildings: Reverted edits by 27.125.185.186 (talk) to last revision by Designing Buildings

2022-04-01T09:57:52Z

Reverted edits by 27.125.185.186 (talk) to last revision by Designing Buildings

← Older revision		Revision as of 09:57, 1 April 2022
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	* Guide to DB11, Sarah Lupton, RIBA Publishing 2011.		* Guide to DB11, Sarah Lupton, RIBA Publishing 2011.

−	~~[[Category:Articles_needing_more_work]]~~ [[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:Appointments]] [[Category:Client_procedures]] [[Category:Construction_management]] [[Category:Construction_techniques]] [[Category:Contracts_/_payment]] [[Category:Design]] [[Category:Procurement]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:Appointments]] [[Category:Client_procedures]] [[Category:Construction_management]] [[Category:Construction_techniques]] [[Category:Contracts_/_payment]] [[Category:Design]] [[Category:Procurement]]