What is Six Sigma?

Six Sigma is a rigorous and a systematic methodology that utilizes information (management by facts) and statistical analysis to measure and improve a company's operational performance, practices and systems by identifying and preventing 'defects' in manufacturing and service-related processes in order to anticipate and exceed expectations of all stakeholders to accomplish effectiveness.

The goal of Six Sigma is to increase profits by eliminating variability, defects and waste that undermine customer loyalty.

Commonly defined as 3.4 defects per million opportunities, Six Sigma can be defined and understood at three distinct levels: metric, methodology and philosophy:

1. 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.

2. Methodology: DMAIC/DFSS structured problem solving roadmap and tools.

3. Philosophy: Reduce variation in your business and take customer-focused, data driven decisions.

Six Sigma is 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.

Link to iSixSigma site

Six Sigma Organizational Architecture

Six Sigma is a quality methodology that can produce significant benefit to businesses and organizations. Not much text, however, has been written about the structure needed to successfully implement Six Sigma quality within your business or organization. This article will focus on roles and responsibilities, as well as required rewards and recognition for a successful Six Sigma quality program.

Roles and Responsibilities:

Quality Leader/Manager (QL/QM) - The quality leader's responsibility is to represent the needs of the customer and to improve the operational effectiveness of the organization. The Quality function is typically separated from the manufacturing or transactional processing functions in order to maintain impartiality. The quality manager sits on the CEO/President's staff, and has equal authority to all other direct reports.

Master Black Belt (MBB) - Master Black Belts are typically assigned to a specific area or function of a business or organization. It may be a functional area such as human resources or legal, or process specific area such as billing or tube rolling. MBBs work with the owners of the process to ensure that quality objectives and targets are set, plans are determined, progress is tracked, and education is provided. In the best Six Sigma organizations, process owners and MBBs work very closely and share information daily.

Process Owner (PO) - Process owners are exactly as the name sounds – they are the responsible individuals for a specific process. For instance, in the legal department there is usually one person in charge -- maybe the VP of Legal -- that's the process owner. There may be a chief marketing officer for your business -- that's the process owner for marketing. Depending on the size of your business and core activities, you may have process owners at lower levels of your organizational structure. If you are a credit card company with processes around billing, accounts receivable, audit, billing fraud, etc., you wouldn't just have the process owner be the chief financial officer, you would want to go much deeper into the organization where the work is being accomplished and you can make a big difference.

Black Belt (BB) - Black Belts are the heart and soul of the Six Sigma quality initiative. Their main purpose is to lead quality projects and work full time until they are complete. Black Belts can typically complete four to six projects per year with savings of approximately $230,000 per project. Black Belts also coach Green Belts on their projects, and while coaching may seem innocuous, it can require a significant amount of time and energy.

Green Belt (GB) - Green Belts are employees trained in Six Sigma who spend a portion of their time completing projects, but maintain their regular work role and responsibilities. Depending on their workload, they can spend anywhere from 10% to 50% of their time on their project(s). As your Six Sigma quality program evolves, employees will begin to include the Six Sigma methodology in their daily activities and it will no longer become a percentage of their time -- it will be the way their work is accomplished 100% of the time.

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