Design-Build vs Progressive Design-Build: Key Differences

Choosing the right project delivery method can make or break a construction project. Among the most discussed methods in the industry today are design-build vs progressive design-build. Both approaches offer streamlined processes compared to traditional methods, but they’re not interchangeable. For more insights into project delivery methods, check out our comprehensive guide on Project Delivery Methods.

Let’s talk about their key differences and when each is best suited to deliver project success.

What is Design-Build?

Design-build is a delivery method where the owner contracts a single entity to manage both design and construction. This entity, often referred to as the design-builder, takes on the responsibility of coordinating the project from start to finish.

Key Features of Design-Build:

• Single Point of Responsibility: The owner works with one contract, simplifying communication and accountability.
• Faster Project Delivery: With design and construction phases overlapping, projects often progress more quickly.
• Cost Certainty: The design-builder provides a lump sum or guaranteed maximum price early in the process.

When to Use Design-Build:

• Tight Timelines: Ideal for projects requiring quick completion.
• Well-Defined Scope: Best suited for projects with clear requirements and minimal expected changes.

What is Progressive Design-Build?

Progressive design-build (PDB) builds on the principles of traditional design-build but offers greater flexibility during the early stages of a project. In PDB, the owner selects a design-builder based on qualifications rather than cost and collaborates closely during the design phase before finalizing the price and construction details.

Key Features of Progressive Design-Build:

• Two-Phase Process: The project is developed in two stages: pre-construction (collaborative planning and design) and construction.
• Owner Involvement: Owners actively participate in the design decisions, ensuring alignment with project goals.
• Flexibility: The approach allows adjustments to scope, budget, and schedule as the design progresses.

When to Use Progressive Design-Build:

• Complex Projects: Ideal for projects with evolving or uncertain requirements.
• High Collaboration Needs: Suited for projects where owner input is critical to success.

Key Differences Between Design-Build vs Progressive Design-Build

Both design-build and progressive design-build aim to streamline project delivery. However, they differ significantly in terms of flexibility, collaboration, and pricing. Here’s a side-by-side comparison to help you distinguish the two methods:

By understanding these distinctions, owners and project teams can better align their choice with the unique demands of their projects.

Benefits and Challenges of Each Approach

Understanding the advantages and limitations of each delivery method is crucial for making an informed decision. Each approach brings unique strengths and challenges that align differently depending on project goals, complexity, and collaboration needs. Let’s break them down:

Design-Build Benefits

• Clear accountability.
• Streamlined communication.
• Cost predictability.

Design-Build Challenges

• Limited owner input during design.
• Potential for misaligned expectations.

Progressive Design-Build Benefits

• Greater owner control.
• Improved risk management.
• Better suited for complex or evolving projects.

Progressive Design-Build Challenges

• Longer pre-construction phase.
• Higher initial cost due to collaboration efforts.

How to Choose the Right Method

Here’s a quick guide to help you decide from progressive design-build vs design-build:

Choose Design-Build if:

• You need speed and cost certainty.
• The project scope is straightforward and unlikely to change.

Choose Progressive Design-Build if:

• The project is complex or involves uncertain requirements.
• You want to actively participate in the design process.

Which Method Fits Better?

Imagine you’re managing a municipal infrastructure project. If you’re working on a straightforward road extension with a clear scope, design-build might be the perfect choice to deliver it quickly and within budget.

However, if the project involves a complex wastewater treatment facility with evolving requirements, progressive design-build offers the flexibility and collaborative benefits to adapt to changes effectively.

Final Thoughts

Understanding the differences between design-build and progressive design-build is crucial for selecting the best delivery method for your project. While both aim to integrate design and construction seamlessly, their unique approaches cater to different project needs.