Cost Management – Procurement Strategy
Post 2 of the Built Environment Series | For Quantity Surveyors, Project Managers, Construction Professionals & Students
No two construction projects are identical — and no single procurement route is right for every situation. Yet one of the most common mistakes made in the early stages of a project is to default to a familiar contract form without properly considering whether it is the most appropriate choice. The procurement decision shapes everything that follows: how risk is allocated, how the design develops, how the programme is structured, and ultimately whether the project delivers value for money.
This post sets out the principal procurement routes available in the UK construction market, the contract families most commonly associated with them, and the key factors that should drive the selection decision.
What Is Procurement Strategy?
Procurement strategy is the framework within which a client engages the construction supply chain to deliver a project. It encompasses the procurement route (the overall method by which design and construction responsibilities are organised and appointed); the contract strategy (the specific form of contract used to govern the relationship between the parties); the tendering approach (how the market is approached — open tender, selective tender, negotiated, framework, and so on); and the packaging strategy (how the work is divided between a main contractor and specialist subcontractors).
Getting these decisions right at the outset is one of the most important contributions a QS or commercial manager can make to a project. A poorly chosen procurement route creates misaligned incentives, disputes over responsibility, and commercial pressure that can undermine even the best design team.
The Three Principal Procurement Routes
1. Traditional (Design-Bid-Build)
In traditional procurement, the employer appoints a design team (architect, structural engineer, M&E engineer, QS) to develop the design to a high level of completeness before going to the market. Contractors are then invited to tender on the basis of a fully detailed Bill of Quantities (or specification and drawings), and the lowest compliant bid — in theory — wins.
The design team is appointed first and reports directly to the employer. The design is developed to RIBA Stage 4 (Technical Design) before tender, and the contractor is appointed on a lump sum or remeasured basis. The contractor takes responsibility for building what is designed; the design team retains design liability.
Advantages: clear accountability, with design responsibility sitting with the design team and construction responsibility with the contractor; price certainty (on a lump sum basis) before construction begins; competitive tendering driving value; and the employer retaining control over design quality and specification.
Disadvantages: a longer pre-construction period because the design must be substantially complete before the contractor is appointed; no contractor input into buildability or sequencing during design; disputes at the interface between design and construction are common; and changes during construction can be costly and contentious.
Best suited to: projects where design quality and specification control are paramount; repeat or standardised building types where the employer has a mature brief; public sector projects with strong accountability requirements.
2. Design and Build (D&B)
In Design and Build procurement, a single contractor takes responsibility for both the design and the construction of the project. The employer defines their requirements in an Employer’s Requirements (ER) document — which may range from a brief outline to a near-complete design — and the contractor responds with a Contractor’s Proposals (CP).
There are several variants. Novation D&B is by far the most common in the UK: the employer appoints a design team to develop the design to RIBA Stage 2 or 3, then novates (transfers) the design team’s appointment to the winning contractor, who drives the design to completion. In pure D&B, the employer produces a performance specification or outline brief only, and the contractor develops the design from scratch. In Develop and Construct, the employer retains their own design team to develop the design to Stage 4, but the contractor takes on design liability for the works.
Advantages: single point of responsibility for design and construction; contractor input into buildability, programme, and logistics during design; faster delivery through design and construction overlap; cost certainty on the contract sum (subject to variations); and reduced claims at the design/construction interface.
Disadvantages: the employer loses direct control over design quality once the contract is let; value engineering by the contractor can reduce specification quality; the Employer’s Requirements document is critical and poorly drafted ERs lead to disputes; and the employer’s QS must scrutinise the Contractor’s Proposals carefully at tender to ensure like-for-like comparison.
Best suited to: commercial developments, residential schemes, and projects where programme and cost certainty are higher priorities than bespoke design; projects where the employer is an experienced developer with clear output requirements.
3. Management Contracting and Construction Management
These two routes separate the management of the construction process from the actual execution of the work. They are used primarily on large, complex, or fast-track projects where early contractor involvement and programme overlap are critical.
In Management Contracting, the employer appoints a Management Contractor who takes no direct construction risk but manages a series of works contractors on the employer’s behalf. The Management Contractor’s fee is fixed, and all works packages are let competitively. In Construction Management, the employer directly contracts with each trade contractor, and the Construction Manager is engaged as a professional consultant — not a contractor — managing the programme and interfaces between trades on the employer’s behalf. The employer bears all construction risk directly.
Advantages (both routes): maximum programme overlap — design and construction proceed in parallel with packages released as design is completed; market testing through competitive tendering of individual packages; and flexibility to accommodate design changes without the cost premium of main contractor variations.
Disadvantages: the employer carries significantly more risk, particularly on cost (there is no guaranteed maximum price until all packages are let); it requires a sophisticated employer with the resources and capability to manage a complex procurement process; and interface risks between packages require careful coordination.
Best suited to: large, complex projects with urgent programmes; projects where the scope cannot be fully defined before construction must begin; employers with mature in-house project management capability (large retailers, airport operators, experienced developers).
Contract Families
The procurement route determines the structure of the arrangement; the form of contract provides the legal framework within which it operates. In the UK, the principal contract families are:
JCT (Joint Contracts Tribunal)
The JCT suite is the most widely used family of construction contracts in the UK private sector. Key forms include the JCT Standard Building Contract (SBC) — the traditional workhorse, used on traditional procurement with a Bills of Quantities or Specification and Drawings; the JCT Design and Build Contract (DB) — the standard form for D&B projects; the JCT Intermediate Building Contract (IC) — for less complex projects; and the JCT Minor Works Building Contract (MW) — for simple, low-value works. JCT contracts are written in relatively accessible language and are familiar to most UK contractors and subcontractors.
NEC (New Engineering Contract)
The NEC suite — now in its fourth edition (NEC4) — takes a very different approach. NEC contracts are structured around collaborative working, early warning of risk, and proactive programme management. They are the preferred contract family on most UK public sector infrastructure projects, mandated by the Cabinet Office for central government works and widely used on highways, rail, and utilities projects.
NEC4 provides six main options covering different risk allocation profiles: Option A (priced contract with activity schedule — lump sum); Option B (priced contract with bill of quantities — remeasured); Option C (target cost with activity schedule); Option D (target cost with bill of quantities); Option E (cost reimbursable); and Option F (management contract). Key features include a mandatory Early Warning mechanism, live programme requirements, and the Compensation Events process — a prescriptive and time-bound mechanism for assessing and agreeing change that is more demanding than JCT.
FIDIC (Fédération Internationale des Ingénieurs-Conseils)
FIDIC contracts are the international standard for engineering and construction projects and are used extensively on cross-border projects, World Bank and development finance institution (DFI) funded schemes, and major infrastructure projects in emerging markets. The key forms are the Red Book (Conditions of Contract for Construction — employer-designed); the Yellow Book (Conditions of Contract for Plant and Design-Build); and the Silver Book (Conditions of Contract for EPC/Turnkey Projects).
Risk Allocation: The Central Question
At the heart of every procurement decision is the question of risk allocation. Who bears the risk of cost overrun? Who is responsible if the design is incomplete? Who takes the programme risk? The spectrum runs from Construction Management (where the employer carries the most risk) through to EPC/Turnkey (where the contractor carries almost all risk).
A key principle — one that is easily stated but frequently ignored — is that risk should be allocated to the party best placed to manage it. Passing risk to a contractor who cannot price it accurately or manage it effectively does not eliminate that risk; it simply drives it underground, to re-emerge as a claim, a dispute, or a contractor insolvency.
The consequence of inappropriately allocating risk to a contractor is almost always a higher tender price (because the contractor will load their bid to account for the risk) or a dispute during the project (because the contractor cannot sustain the risk and looks for ways to recover their costs through variations and claims).
Tendering Approaches
Once the procurement route and contract strategy are determined, the employer must decide how to approach the market. Open tender allows any contractor meeting minimum criteria to submit a bid — maximising competition but potentially generating a large number of returns to evaluate. Selective tender invites a shortlist of pre-qualified contractors, balancing competition with quality control. Negotiated tender involves selecting a contractor and agreeing their price without competition — appropriate where a specialist has unique capability or time does not permit a full process. Framework agreements are particularly common in the public sector, establishing pre-agreed terms and pricing with a group of contractors, enabling individual projects to be called off without a full re-tender.
Key Factors in Selecting the Procurement Route
The selection of an appropriate procurement route should be driven by a structured assessment of the following factors:
Certainty of cost and price. How important is it to have a fixed price before construction starts? If the employer needs to commit funding on the basis of a known cost, a lump sum traditional or D&B contract is preferable to a cost-reimbursable or management arrangement.
Programme. Is there time pressure that requires design and construction to overlap? If so, management contracting, construction management, or a fast-track D&B approach may be necessary.
Design quality and employer control. If the project is architect-led and design quality is paramount, traditional procurement preserves that control. If output specification is more important than how that output is achieved, D&B is appropriate.
Complexity and risk. How well understood is the scope? Highly complex or technically uncertain projects may be better procured on a cost-reimbursable or target cost basis.
Employer’s experience and capacity. Can the employer manage a complex procurement process? Construction management in particular requires active employer involvement and is not appropriate for an inexperienced client without strong professional support.
Market conditions. In a buoyant market with high demand, contractors may price risk heavily in lump sum tenders. A target cost or cost-reimbursable arrangement may deliver better value by providing the contractor with more visibility of actual costs.
The Procurement Strategy Report
The formal output from this stage of the process is typically a Procurement Strategy Report — a document prepared by the QS or commercial manager setting out the recommended procurement approach, with supporting rationale. A well-structured report will summarise the project objectives and key constraints; assess the principal procurement options against those objectives; recommend a preferred route with clear reasoning; identify the appropriate contract form and any required amendments; set out the proposed tendering approach and contractor selection criteria; and identify key risk areas and how they will be addressed in the contract.
This document should be prepared and agreed with the client before the design team proceeds beyond RIBA Stage 2. Procurement decisions made late — or not made at all — are a common source of project difficulties.
Summary
Procurement strategy is not a procedural formality — it is a fundamental commercial decision that shapes the entire project. The key points to carry forward:
- There is no universally superior procurement route; the right choice depends on the project’s specific objectives, constraints, and risk profile
- Risk should be allocated to the party best placed to manage it — not simply transferred to the contractor as a matter of course
- The choice of contract family (JCT, NEC, FIDIC) must be aligned with the procurement route and the employer’s sector and experience
- The Employer’s Requirements document is the most critical document in a D&B procurement — it defines what the employer is entitled to receive
- A formal Procurement Strategy Report should be prepared and agreed before significant design expenditure is committed
In the next post in this series, we turn to contract administration — the day-to-day management of the construction contract once a contractor has been appointed, including the management of variations, compensation events, valuations, and the interim payment process.
This series is written for quantity surveyors, project managers, construction professionals, and students in the built environment. Feedback and questions are welcome.