Negative project management
The design and build process in principle is a clever solution to the problem of separating design from project management. However, the problem is that the solution is fundamentally flawed. The contractor is in charge of the whole project and they buy and sell every element of the project. High margins and confrontation often means the client can’t deliver a project without a single change.
Lack of transparency
With the design and build process, the mark-up is concealed so the client doesn’t know how much resources cost. The contractor decides all of the finishes and often doesn’t communicate back to the client. They struggle to see the bigger picture and can make decisions in the interest of themselves rather than the client. This is counterproductive and can prevent the client from conducting similar work in the future.
Clients think they are guaranteed a time-scale result however this is only likely if they know exactly what they are buying and they can negotiate that. Often though this is very hard to communicate.