Six Sigma is a quality management methodology used to help businesses improve current processes, products, or services by discovering and eliminating defects. The goal is to streamline quality control ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Robert Kelly is managing director of XTS ...

To achieve and to communicate quality of official statistics, it is essential that national statistical institutes adopt some system of quality by design, i.e. formal quality certification, e.g. ISO ...