How six sigma improve quality?

The essential goal of Six Sigma is to eliminate defects and waste, thereby improving quality and efficiency, by streamlining and improving all business processes. ... Six Sigma seeks to improve the quality of process outputs by identifying and removing the causes of defects (errors) and minimizing variability in processes.

Hugely popular in today's world, Six Sigma is a problem solving, high-performance approach to analyzing the causes of variation in processes and determining appropriate solutions. Apart from helping increase productivity, application of Six Sigma reduces variability and waste in the business.

Six Sigma tools are defined as the problem-solving tools used to support Six Sigma and other process improvement efforts. The Six Sigma expert uses qualitative and quantitative techniques to drive process improvement.

Six Sigma has always been firmly rooted in Amazon's company culture. ... They took things one step further by training their employees as Six Sigma Black Belts. Using Six Sigma methods, they were able to reduce variation by actively seeking it out using DMAIC, Root Cause Analysis, and similar tools.

And what is six sigma used for?

– It should be used when there is a need to define an unknown cause or situation. – When issues are not well defined. Six Sigma in layman's term is a scientific approach to problem solving as it uses data in dealing with all sorts of problem.