Methods of Procurement in Construction

Procurement strategy is one of the most important decisions in a construction project. It determines who carries risk, how quickly a project can be delivered, and how much control the client has over design and cost.

Understanding procurement methods helps you understand why projects are structured the way they are.

What Is Procurement in Construction?

Procurement refers to the process by which a client obtains the services required to design and construct a project.

This includes selecting:

• How the design will be produced
• Who will carry out the construction
• How risk will be allocated
• How the contractor will be paid

Different procurement strategies exist because projects vary in complexity, risk, and time constraints.

1. Traditional Procurement (Design Bid Build)

This is one of the oldest and most widely understood procurement routes.

In this method the client appoints consultants to complete the design first. Once the design is sufficiently developed, contractors tender to build the project.

The contractor is therefore responsible only for construction, not design.

Advantages

• Clear separation between design and construction.
• The client retains control over the design and quality.
• Tendering based on completed designs allows competitive pricing.
• Roles and responsibilities are well understood across the industry.

Disadvantages

• Projects typically take longer because design must be completed before construction begins.
• There is limited contractor input during design, which can reduce buildability efficiency.
• If design errors occur, disputes over responsibility can arise.
• Changes during construction may lead to cost increases.

Traditional procurement works well where the client prioritises design control and cost certainty but is less concerned about programme speed.

 

2. Design and Build

Under design and build procurement, the contractor takes responsibility for both the design and construction of the project.

The client usually provides an outline design or performance specification and the contractor develops the detailed design.

This method has become increasingly common in both private and public sector projects.

Advantages

• A single point of responsibility for both design and construction.
• Improved coordination between designers and contractors.
• Construction can begin earlier, shortening the programme.
• Reduced risk of disputes between designer and contractor.

Disadvantages

• The client has less control over the final design.
• Contractors may prioritise cost efficiency over design quality.
• Client requirements must be clearly defined at the outset.
• Changes requested by the client later can be expensive.

Design and build is often chosen when programme certainty and risk transfer are key priorities.

 

3. Management Contracting

Management contracting involves the client appointing a management contractor who oversees the construction works, while the actual work packages are carried out by specialist subcontractors.

The design typically continues while construction progresses.

Advantages

• Allows early start on site before full design completion.
• Flexibility to adapt design as the project progresses.
• Specialist subcontractors can be selected for specific elements of work.
• Suitable for complex or fast track projects.

Disadvantages

• Final cost certainty is often lower at the outset.
• The client retains greater financial risk.
• Coordination between multiple subcontractors requires strong management.
• Projects can become more complex to administer.

This method is commonly used on large or technically complex projects.

 

4. Construction Management

Construction management is similar to management contracting but differs in one key way-

The construction manager acts as an advisor to the client rather than taking contractual responsibility for the work.

The client enters into contracts directly with individual trade contractors.

Advantages

• Maximum flexibility for the client.
• Early contractor involvement improves buildability.
• Potential for faster project delivery.
• Greater transparency in cost and procurement.

Disadvantages

• The client takes on significantly more risk.
• Requires experienced client leadership and management.
• Coordination responsibility remains with the client.
• Cost certainty can be difficult early in the project.

 This method is typically used by experienced clients managing complex developments.

How Procurement Impacts Engineers

Procurement choices influence many aspects of engineering work including:

• Design responsibilities
• Risk allocation
• Programme constraints
• Budget management
• Stakeholder communication

 For example, engineers working on a design and build project may need to consider buildability and contractor constraints much earlier in the design process.

 Understanding procurement therefore helps engineers make better technical decisions that align with project objectives.

Final Thoughts

Procurement strategy shapes how a project is delivered, who carries risk, and how decisions are made throughout the project lifecycle.

No procurement route is universally better than another. The most suitable option depends on the project’s complexity, risk profile, programme requirements and the level of control desired by the client.

 For engineers, understanding procurement methods provides valuable insight into how technical decisions interact with commercial and management considerations in real projects.

 

What To Do Next 

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