Source code quality is very important to embedded systems because software embedded into a product is difficult to change. In order to improve source code quality, the quality of analysis and design models as well as the quality of source code should be considered because code quality can be improved by design model quality. With the reason, we suggest, in this paper, "Practice Pattern" as one of practical techniques to improve embedded software quality, which focus on improving the quality of software design model. Practice pattern is a process pattern to guide modeling activities in software development process. We believe that adopting our pattern provides the benefits of performance, modularization, and easy to implement for embedded software.