CMM/CMMI (capability maturity model/CMM integration) has been accepted since 1999 by Chinese software organizations, and widely used since then. But there are limited number of CMM/CMMI users in China. By launching a survey, problems of using CMM/CMMI are identified, and the negative impact is analyzed. Based on the analysis, a PDCA(plan-do-check-action)-based software process control and improvement model is presented, and the SoftPM which is based on the model has been developed. The SoftPM has been widely used in China, which proves the effectiveness of the model to solve the problems identified in the survey. Software process effectiveness and efficiency are also improved for those software organizations that are using or will use CMM/CMMI.