Implementation occurs in the "response" phase of the SARA (Scanning, Analysis, Response, Assessment) problem-solving model. The response phase consists of at least three tasks: conducting a broad search for response alternatives, choosing from among those alternatives, and implementing the chosen alternatives. Of four basic reasons why a particular problem-solving initiative might fail to achieve its set goal, this guide focuses on one of them, i.e., the responses developed from the problem analysis were improperly or insufficiently implemented, or not implemented at all. In providing guidance on how to avoid this cause of a failed problem-solving response, this guide provides assistance in conducting the four key stages of response implementation. The first stage is the pre-implementation stage, which addresses the factors that should be considered before implementation. These factors include internal and external support, leadership, communication, resources, and staffing. The second stage is the planning stage, during which specific implementation mechanics and systems should be considered. These include the application of a project management framework, the matching of project goals and objectives, development of the response, setting a realistic timetable, analyzing risks, and production of an action plan. The third stage is the implementation stage, in which responses are put in place, monitored, and adjusted. The fourth stage, the post-implementation learning stage, involves identifying implementation successes and failures. 31 references and 17 annotated recommended readings