The Six Sigma Strategy is based on meeting the customer's requirements with statistical consistency so that by eliminating variability and defects the process output results in waste reduction and customers' satisfaction. This strategy is implemented with an enabling philosophy of leadership from the top-down that promotes continuous improvement and team work.

Six Sigma is a precise, rigorous, methodical and organized methodology which utilizes verifiable & information using statistical analysis to measure and improve a company's operational performance, practices and systems by identifying and preventing defects in all processes. It also implements controls in order to anticipate and exceed expectations of all stakeholders throughout the supply chain all the way to the end user.

Six Sigma can be understood/perceived at three levels:

• Metric: 3.4 Defects Per Million Opportunities. DPMO allows you to take complexity of product/process into account. Rule of thumb is to consider at least three opportunities for a physical part/component - one for form, one for fit and one for function, in absence of better considerations. Also you want to be Six Sigma in the Critical to Quality characteristics and not the whole unit/characteristics.
• Methodology: Define, Measure, Analyze, Improve & Control (DMAIC) and Design for Six Sigma (DFSS) structured problem solving roadmap and tools.
• Philosophy: Reduce variation in your business and take customer-focused, data driven decisions.

It can also be said that Six Sigma is a systematic way of management with facts and a methodology that provides businesses with the tools to improve the capability of their business processes. This increase in performance and decrease in process variation leads to defect reduction and vast improvement in profits, employee morale and quality of product.