Purpose -This paper aims to introduce some of the most important and fundamental points about Six-Sigma and the main points that researchers, implementers and users should keep in mind in addressing Six-Sigma to large and small companies as well as system development and/or planning for such applications. In addition to that this author proposes an algorithm for calculating the overall sigma level of a multistage system. Example problems are provided and the weighting technique is discussed. Design/methodology/approach -The paper provides a general review of the Six-Sigma and some of its extensions. The topic is followed by the introduction of a new algorithm that can be used for calculating the overall sigma level of a multistage system. Findings -In a journey to business excellence, an organization is successful if specific goals for critical processes of the organization are identified. The quality management programs implemented can modernize and simplify activities towards the ultimate goal of the business. Regarding that, the author discusses key issues as such as leadership commitment, what Six-Sigma would bring to the organization, how it works, Six-Sigma business strategies, Six-Sigma methodologies, mathematical formulation of Six-Sigma, the use of simulation with Six-Sigma, new Six-Sigma, benefits of Six-Sigma, costs of Six-Sigma, critical success factors and the future of Six-Sigma. Practical implications -Six-Sigma has the potential to change the quality program of an organization. When the selected quality program is Six-Sigma, the organizational goal is to reach a sigma level of 6, or the objective of 3.4 defects per million opportunities. Originality/value -In this paper, the author reviews the fundamental concept of Six-Sigma and elaborates why it is important for small and large organizations to employ Six-Sigma concepts into their working methodology for quality improvement. The DMAIC steps to be taken, tools to be used and the deliverables are completely discussed. The author also discusses a Six-Sigma weighted average methodology for calculating the overall Six-Sigma level for an organization with many working stages or processes.
Purpose -The author aims to review the fundamental concept of quality function deployment and to discuss the facts that the road to success for new product development is the identification of customers' requirements and their conversion into engineering design requirements. Thereafter, the author seeks to present an in-depth review of the subject and to study five new cases on the topic of quality function deployment. Design/methodology/approach -The paper discusses the key elements of quality function deployment and the fact that the vision for the development of a comprehensive quality system can be built on the principles of quality function deployment taking customer requirements into consideration and relating them to design requirements. Findings -To make the product development task successful and bring competitive advantages to the core business, management must be committed to the needs of customers through marketing surveys and implementing these in the process of product development by converting them into engineering design requirements. Originality/value -This article reviews quality function deployment and its extensions such as fuzzy QFD, AHP and QFD, statistically extended QFD, dynamic QFD, and other extensions. In addition, cases covering the topics of a ship of quality, cost-design parameter modeling, an enhanced version of quality function development, financial factors and uncertainties in the product design process with fuzzy formulation, and a model for prioritizing and designing rule changes for the game of soccer, are also reviewed.
PurposeThe purpose of this paper is to review the fundamental concept of collaborative supply chain (CSC) and discuss the facts that a road to success in the process of design, implementation and operations of a supply chain is the identification of superior strategies and clear objectives. One of these strategies is known as CSC, that needs to be studied, evaluated and implemented.Design/methodology/approachDiscusses key elements of CSC and the fact that the vision for the CSC can be built upon principles as such as automation, information, trust and commitment, quality leadership, customer focused, collaborative and e‐collaborative partnerships, and integrated information system.FindingsThe paper finds that to make supply chain management successful, management must be committed to high standard of performance, trust including long‐term collaborative relationships that can deliver results independent of industry and sector type.Originality/valueOwing to the fact that a better management of production system is related to the full understanding of the technologies implemented and the system under consideration, the CSC and its related components are discussed.
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