Design & Build Structure
Design priority
PROGRESS - *****
Design is independent of contractors and is established as central to project solution
Design & Build - *
Contractor is responsible for detailed design, tendency towards contractor biased solutions
Project Management
PROGRESS - *****
Independent complete management
Design & Build - **
Contractor is responsible, not independent
Cost
PROGRESS - *****
2 tiered project structure, cost transparency. Contractor bids are competitive due to project certainty & confidence in being paid.
Design & Build - **
3 tiered project structure
Cost certainty
PROGRESS - *****
Tender by contractors to established specification / design
Design & Build - *
Contract structure encourages substantial variations through bid low and sell extras culture
Time scale
PROGRESS - *****
Project can be structured prior to building selection resulting in fastest design development and tender is usually completed prior to lease completion
Design & Build - ***
Early contractor competition and client evaluation takes time. Design is developed in stages often resulting in rework. Rarely results in project readiness prior to property lease completion
Client resources
PROGRESS - *****
Client time requirements are minimal through full professional representation and single point of contact
Design & Build - **
Client involvement pre selection of contractor is multiplied, ongoing time requirements of managing the contractor
Quality
PROGRESS - *****
Professional representation separated from contractors
Design & Build - **
Client is not represented independently, tendency towards lower standards, changes in specification, contractor biased designs
Value
PROGRESS - *****
Established value through competitive tender, overall costs expected to be lowest possible through flat transparent structure.
Design & Build - **
Different D&B bids with multiple designs and costs make evaluation difficult, once instructed contractor then controls the project.