Abstract: The program logic pattern is a kind of method based on the project logic model, which could be used to analyze the connotations and relationships of a complex project clearly by using simple charts. Based on the program logic model, performance evaluation of service is conducted through the in-depth analysis of the whole process including the resource input, the service process and the service performance, the conclusion is that the program logic model is irreplaceably superior to other methods, especially in terms of uplifting the performance of service, improving the loose-management and low-performance impression of the public on public welfare projects. At the same time, it also analyzes the limitations of the program logic pattern, especially in the neglect of co-function of multiple elements and the low distinction of targets and direct purposes. Suggestions are made to adopt the ideas of logic pattern and take it as a base to build an evaluation system for the performance of public welfare programs.

Key words: program logic model, public benefit projects, service performance, evaluation research