底特律水和污水处理部门（DWSD）是美国第三大供水设施，平均每天处理6.5亿加仑水，为密歇根州东南部126个不同社区的约400万人口提供服务。为了在系统中进行适当程度的制衡，并在提供服务的质量和财务责任方面维护公众利益，大多数DWSD合同的实施需要进行多个级别的审查和批准。本文讨论的程序将提供必要的制衡、审查和批准，以及基于质量的设计师和工程师选择，同时提供具有成本竞争力的承包商采购。 此外，该程序将在时间敏感的系统改进方面为DWSD提供灵活性，并应降低公用事业客户的总体成本。

The Detroit Water and Sewerage Department (DWSD) is the third largest water utility in the United States, treating an average of 650 million gallons of water per day to serve a population of about four million people in 126 separate communities in Southeastern Michigan. In order to have an appropriate level of checks and balances in the system and to safeguard the interest of the public as it relates to the quality of services provided and financial accountability, many levels of review and approval are required to implement most DWSD contracts. This paper discusses a procedure that will provide the necessary checks and balances, reviews and approvals, and a quality based selection of designers and engineers, while providing cost competitive procurement of contractors. Also the procedure will provide flexibility to DWSD in time sensitive system improvements and should reduce overall costs to the utility customers.