Dear Riyaz,
The most popular Six Sigma methodology is called D-M-A-I-C, which
stands for Define-Measure-Analyze-Improve-Control. The Measure and
Analyze phases provide Quantitative and Qualitative techniques for
analysis. If you have a method of collecting reliable data (or have
historical data), Six Sigma provides you the ways of analyzing it to
aid decision making.
Regards,
VK