第3部分概述了设计或施工服务合同。该手册概述了从构思到签订服务合同，再到完成合同应采取的各种步骤。

Part 3 provides a general overview on contracting for designing or construction services. The manual outlines the various steps that should be taken, from the conception of the idea, to contracting for services, to the completion of the contract.