When the owner, designers and builders share one agreement and one room, the model stops being handed over and starts being worked on together. Here is what changes for the BIM person.
Most projects pass the model from one party to the next: the designers model, the contractor checks, the trades remodel for fabrication. Integrated project delivery (IPD) works differently. The owner, the lead designers and the builder, often with key trades, sign one agreement, and their profit depends on how the whole project turns out. They work together from early design, usually in a shared office called the big room.
Under IPD, costs are reimbursed and profit goes into a shared pool, paid against targets for cost and quality. Liability between the parties is often limited. Decisions are taken by a joint team with members from each party. See the IPD entry for the details.
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