Six Sigma methodology

The following two basic methods are used with the Six Sigma methodology  

Additional information on the application of Six Sigma in the area of health care is available in Refs. [31-34], 

---

Figure I 9-5 Six Sigma methodologies for measuring process performance. Method of measuring process variation is applicable to analytical testing processes.

Before proceeding to the first product design, in Section 19.2, an introduction to the use of six-sigma methodology for the design of high-quality products is presented. 

Chapter 3 presents introductory aspects of safety and human factors. Chapter 4 is devoted to methods considered useful to perform patient safety analysis. These methods include failure modes and effect analysis (FMEA), fault tree analysis (FTA), root cause analysis (RCA), hazard and operability analysis (HAZOP), six sigma methodology, preliminary hazard analysis (PFfA), interface safety analysis (ISA), and job safety analysis (JSA). Patient safety basics are presented in Chapter 5. This chapter covers such topics as patient safety goals, causes of patient injuries, patient safety culture, factors contributing to pahent safety culture, safe practices for better health care, and patient safety indicators and their selection. 

Froedtert now plans to become a "Six Sigma Organization," which involves expanding the use of the Six Sigma methodology to encompass reduction of medical errors, promotion of patient safety, cost reduction, and enhancement of process efficiency. 

Let X be a vector of process states, j be a vector of measured process outputs, and z be a vector of process quality variables or attributes of the manufactured product that needs to meet specifications. In six-sigma methodology, described in Section 2, all of the components of z are referred to as critical-to-quality (CTQ) variables. In the framework of integrated product/process design and control, the degrees of freedom that are available to meet the CTQ targets are u, a vector of manipulated variables, d, a vector of uncontrolled, but possibly measurable, disturbances, and 0, a vector of design variables. The relationship between these variables is commonly expressed as follows ... 

The Six Sigma methodology proved a key enabler for supply chain... 

Process variabilily can add to supply chain risk in a number of ways. Variation implies unstable processes with outcomes that are not always predictable. The use of six sigma methodology can be a powerful way to reduce variability in supply chain processes (see box). 

Chapell, A. and Peck, H. (2005) The application of a six sigma methodology to military supply chain processes, in Operations and Global Competitiveness Proceedings of the Euroma Conference, pp. 809-818. 

The Control phase is the last phase of the Six Sigma methodology... 

---