水务行业正在努力以更低的成本生产更高质量的水。通过引入新技术改进过程控制，提高了运行效率，然而，适当选择比例增益和无处不在的PI控制器的重置时间常数仍有很大的好处。不幸的是，即使经过仔细的指导，电厂操作员在安装和操作PI（D）系统方面仍然有困难。如果调节不当，反馈控制系统就没有什么价值。本文描述了一些CAD软件程序的原理和操作，这些程序帮助过程操作员:决定PI（D）控制是否合适，是否自动选择控制器参数值，或；如果PI（D）不合适（例如，如果流程死区时间严重占主导地位），它将指导用户完成设计和实现简单预测PI解决方案所需的步骤。 该软件有可能显著提高水处理厂的效率。

The water utility industry is striving to produce higher quality water at reduced costs. Improved process control through the introduction of new technologies has increased operational efficiency, however, there are still substantial benefits to be made by the proper choice of proportional gain and reset time constant of the ubiquitous PI controller. Unfortunately, even after careful instruction plant operators still have difficulty in installing and operating PI(D) systems. A feedback control system is of little value if it is improperly tuned. This paper describes the theory behind and the operation of some CAD software routines which help the process operator to: decide if PI(D) control is appropriate and if it is to select automatically values for the controller parameters, or; if PI(D) is not appropriate (for example, if the process is heavily dead-time dominant) it guides the user through the steps required to design and implement a simple predictive PI solution. The software has the potential to noticeably increase the efficient operation of water treatment plants.