Progressive Design-Build (PDB)

Definition:
A project delivery method where the owner selects a design-build team early in the process, allowing for a phased and collaborative approach to design development before locking in a guaranteed price.

Synonyms:

Key Components:

• Early Contractor Engagement: The team is involved before design completion.
• Phased Pricing: Costs are refined as the design progresses.
• Integrated Design and Construction Planning: Allows for iterative improvements.

Use Cases/Industries:

• Water and Wastewater Projects: Optimizing treatment facility designs.
• Renewable Energy: Refining wind and solar project layouts based on site conditions.
• Transportation: Highway and transit developments where flexibility is needed.

Advantages:

• Faster Decision-Making: Early collaboration reduces redesign delays.
• Improved Budgeting: The project team adjusts costs based on design evolution.
• Risk Reduction: Issues are addressed progressively rather than at the end of design.

Challenges:

• Requires Experienced Teams: Not all contractors are suited for phased execution.
• Less Competitive Bidding: Owners forgo traditional competitive bid pricing.
• Scope Evolution Risks: Changes during design may lead to increased costs.

Related Terms:
Collaborative Design Process, Phased Procurement, Risk-Based Design-Build

Example:
A municipality selects a progressive design-build team to develop a stormwater management system, allowing iterative cost refinements before setting the final project price.