Elements of the Six Sigma Framework

Elements Of The Six Sigma Framework
Management strategies, such as TQC, TQM, and Six Sigma, are distinguished from each other by their underlying rationale and framework. As far as the corporate framework of Six Sigma is concerned, it embodies the five elements of top-level management commitment, training schemes, project team activities, measurement system and stakeholder involvement.
Stakeholders include employees, owners, suppliers and customers. At the core of the framework is a formalized improvement strategy with the following five steps: define, measure, analyse, improve and control (DMAIC) which will be explained in detail in Section 2.3. The improvement strategy is based on training schemes, project team activities and measurement system. Top-level management commitment and stakeholder involvement are all inclusive in the framework.
Without these two, the improvement strategy functions poorly. All five elements support the improvement strategy and improvement project teams. Most big companies operate in three parts: R&D, manufacturing, and non-manufacturing service. Six Sigma can be introduced into each of these three parts separately. In fact, the color of Six Sigma could be different for each part. Six Sigma in the R&D part is often called “Design for Six Sigma (DFSS),” “Manufacturing Six Sigma” in manufacturing, and “Transactional Six Sigma (TSS)” in the non-manufacturing service sector. All five elements are necessary for each of the three different Six Sigma functions. However, the improvement methodology, DMAIC, could be modified in DFSS and TSS. These points will be explained in detail in Sections 2.6 and 2.7.2.2 Top-level Management Commitment and Stakeholder Involvement
(1) Top-level management commitment
Launching Six Sigma in a company is a strategic management decision that needs to be initiated by top-level management. All the elements of the framework, as well as the formalized improvement strategy, need top-level management commitment for successful execution. Especially, without a strong commitment on the part of top-level management, the training program and project team activities are seldom successful. Although not directly active in the day-to-day improvement projects, the role of top-level management as leaders, project sponsors and advocates is crucial. Pragmatic management is required, not just lip service, as the top-level management commits itself and the company to drive the initiative for several years and into every corner of the company.
There are numerous pragmatic ways for the CEO (chief executive officer) to manifest his commitment. First, in setting the vision and long-term or short-term goal for Six Sigma, the CEO should play a direct role. Second, the CEO should allocate appropriate resources in order to implement such Six Sigma programs as training schemes, project team activities and measurement system. Third, the CEO should regularly check the progress of the Six Sigma program to determine whether there are any problems which might hinder its success. He should listen to Six Sigma reports and make comments on the progress of Six Sigma. Fourth, he should hold a Six Sigma presentation seminar regularly, say twice a year, in which the results of the project team are presented and good results rewarded financially. Finally, he should hold a Champion Day regularly, say once in every other month, in which Champions (upper managers) are educated by specially invited speakers and he should discuss the progress of Six Sigma with the Champions.
It is also the responsibility of top-level management to set “stretch goals” for the Six Sigma initiative. Stretch goals are tough and demanding, but are usually achievable. Some companies set the stretch goal for process performance at 6 sigma or 3.4 DPMO for all critical-to-customer characteristics.
However, the goals can also be set incrementally, by stating instead the annual improvement rate in process performance.
The industry standard is to reduce DPMO by 50% annually.
(2) Stakeholder involvement
Stakeholder involvement means that the hearts and minds of employees, suppliers, customers, owners and even society should be involved in the improvement methodology of Six Sigma for a company. In order to meet the goal set for improvements in process performance and to complete the improvement projects of a Six Sigma initiative, top-level management commitment is simply not enough. The company needs active support and direct involvement from stakeholders.
Employees in a company constitute the most important group of stakeholders. They carry out the majority of improvement projects and must be actively involved. The Six Sigma management is built to ensure this involvement through various practices, such as training courses, project team activities and evaluation of process performance. Suppliers also need to be involved in a Six Sigma initiative.
A Six Sigma company usually encourages its key suppliers to have their own Six Sigma programs. To support suppliers, it is common for Six Sigma companies to have suppliers sharing their performance data for the products purchased and to offer them participation at in-house training courses in Six Sigma. It is also common for Six Sigma companies to help small suppliers financially in pursuing Six Sigma programs by inviting them to share their experiences together in report sessions of project team activities. The reason for this type of involvement is to have the variation in the suppliers’ products transferred to the company’s processes so that most of the process improvement projects carried out on suppliers’ processes would result in improvement of the performance.
Customers play key roles in a Six Sigma initiative. Customer satisfaction is one of the major objectives for a Six Sigma company. Customers should be involved in specific activities such as identifying the critical-to-customer (CTC) characteristics of the products and processes. CTC is a subset of CTQ from the viewpoint of the customers. Having identified the CTC requirements, the customers are also asked to specify the desired value of the characteristic, i.e., the target value and the definition of a defect for the characteristic, or the specification limits. This vital information is utilized in Six Sigma as a basis for measuring the performance of processes. In particular, the R&D part of a company should know the CTC requirements and should listen to the voice of customers (VOC) in order to reflect the VOC in developing new products.