The advent of software process models such as CMM/CMMI (Capability Maturity Model/Capability Maturity Model Integration) has helped software engineers understand principles and approaches of software process improvement. There, however, has been difficulty increasing productivity from applying those models since "how" is not within the scope of the CMM/CMMI. For this reason, SEI (Software Engineering Institute) introduced PSP/TSP (Personal Software Process/Team Software Process); however, they still lack statistical analysis tools and systematic process control techniques for analyzing measures collected in PSP/TSP. Six Sigma, on the other hand, provides the quantitative analysis tools necessary to identify high leverage activities, control process performance and evaluate effectiveness of process changes. Deploying PSP/TSP in conjunction with Six Sigma, therefore, can directly lead to improved project performance and continuous process improvement by analyzing data, assessing process stability, and prioritizing improvements in PSP/TSP. Continuing with this rationale, a framework that guides how and where Six Sigma tools are considered in PSP/TSP is proposed.