ISO/TC 69/SC 7 - Applications of statistical and related techniques for the implementation of Six Sigma

This document describes the necessary steps of the one-way and two-way analyses of variance (ANOVA) for fixed effect models in balanced design. Unbalanced design, random effects and nested design patterns are not included in this document. This document provides examples to analyse the differences among group means by splitting the overall observed variance into different parts. Several illustrations from different fields with different emphasis suggest the procedure of the analysis of variance.

This document provides guidelines for the identification of distributions related to the implementation of Six Sigma. Examples are given to illustrate the related graphical and numerical procedures. It only considers one dimensional distribution with one mode. The underlying distribution is either continuous or discrete.

ISO/TR 16705:2016 describes the necessary steps for contingency table analysis and the method to analyse the relation between categorical variables (including nominal variables and ordinal variables). It provides examples of contingency table analysis. Several illustrations from different fields with different emphasis suggest the procedures of contingency table analysis using different software applications. In ISO/TR 16705:2016, only two-dimensional contingency tables are considered.

ISO/TR 13195:2015 describes the steps necessary to understand the scope of Response Surface Methodology (RSM) and the method to analyse data collected using Central Composite Designs (CCD) through illustration with four distinct applications of this methodology. Response surface methodology (RSM) is used in order to investigate a relation between the response and the set of quantitative predictor variables or factors. Especially after specifying the vital few controllable factors, RSM is used in order to find the factor setting which optimizes the response.

ISO 18404:2015 defines the competencies for the attainment of specific levels of competency with regards to Six Sigma, Lean, and "Lean & Six Sigma" in individuals, e.g. Black Belt, Green Belt and Lean practitioners and their organizations. Yellow Belt is not included in ISO 18404:2015. ISO 18404:2015 excludes Design for Six Sigma.

ISO 17258:2015 describes a methodology for establishing the level of quality, performance, and productivity of processes, products, and services according to Six Sigma principles. It is applicable to all sectors (industries, services, administration, etc.) and to all types of organizations, whether it is already involved in an improvement programme such as Six Sigma, Lean, or not. In particular, it can be used to initiate a Six Sigma programme by providing a selection of improvement projects. NOTE. The focus of this methodology is on criteria, measures, measurement process, and comparison process. The results can then be used to identify good practices of benchmarking.

ISO 13053-2:2011 describes the tools and techniques, illustrated by factsheets, to be used at each phase of the DMAIC approach. The methodology set out in ISO 13053-1 is generic and remains independent of any individual industrial or economic sector. This makes the tools and techniques described in ISO 13053-2:2011 applicable to any sector of activity and any size business seeking to gain a competitive advantage.

ISO 13053-1:2011 describes a methodology for the business improvement methodology known as Six Sigma. The methodology typically comprises five phases: define, measure, analyse, improve and control (DMAIC). ISO 13053-1:2011 recommends the preferred or best practice for each of the phases of the DMAIC methodology used during the execution of a Six Sigma project. It also recommends how Six Sigma projects should be managed and describes the roles, expertise and training of the personnel involved in such projects. It is applicable to organizations using manufacturing processes as well as service and transactional processes.

ISO/TR 12888:2011 describes the measurement process where the characteristic(s) being measured is a continuous variable. Measurement processes where the characteristic(s) of interest is an attribute (i.e. pass/fail) are not treated in this document. ISO/TR 12888:2011 provides examples of simple measurement systems and gives usable results as used in industry where there are two major factors contributing to the variation of the measurement results, such as variation between operators or appraisers and within operators or appraisers.

ISO/TR 14468:2010 assesses a measurement process where the characteristic(s) being measured is (are) in the form of attribute data (including nominal and ordinal data). ISO/TR 14468:2010 provides examples of attribute agreement analysis (AAA) and derives various results to assess closeness of agreement amongst appraisers, such as agreement within appraisers, agreement between appraisers, agreement of each appraiser vs. a standard, and agreement of all appraisers vs. a standard.

ISO/TR 12845:2010 describes the steps necessary to use and to analyse two-level fractional factorial designs through illustration with six distinct applications of this methodology.

ISO/TR 29901:2007 describes the steps necessary to specify, to use and to analyse full factorial designs with four factors through illustration, with five distinct applications of this methodology. Depending on the application, a different number of factors other than four may be considered in the experiment.