The DMAIC process of Six Sigma involves defining and quantifying a problem, collecting the data and clarifying the problem, tools are used to resolve the problem from the root, and finally, the improved operations are used as control to prevent recurrence of the problem. The toolkit of Six Sigma includes a variety of techniques, such as statistical data analysis and quality improvement. Various six sigma tools are: Design of experiments (DOE), failure mode and effects analysis (FMEA), cause-and-effect diagram, process flow diagram and repeatability and reproducibility (R&R) studies. While the methods of Six Sigma are effective in troubleshooting or improving the processes already existing using the DMAIC approach, there are certain challenges when the company relies on Six Sigma alone such as issues with control of the project process. Therefore, the projects are not completed on time.A lack of management support, insufficient resources and failure to understand the voice of customer (VOC) were some of the other problems reported with six sigma which can be resolved when project management is integrated with Six Sigma.