scholarly journals Six Sigma Methodologies and its Application in Manufacturing Firms

Author(s):  
Mudit M. Saxena

Six Sigma is a methodology for process improvement as well as a statistical concept that looks for to determine the variation intrinsic in any process. Six Sigma represents process, that is having 3.4 defects per million opportunities. i.e. 99.99966 % of the products from a Six Sigma process are perfect. Firms can impact their sigma level by combining main principles from the Six Sigma methodology into leadership styles, process management, and improvement activities. Main principle of the technique is a focus on the customer. There are many challenges in the implementation of Six Sigma. A well-run manufacturing team can make the entire firm more successful through cost-saving measures, increased quality and a larger inventory of products that the company can market. The Six Sigma objective is to make sure the process has minimum defects(3.4 defects per million chances). Every aspect of the process must be carefully planned and documented in detail in order for manufacturing to go efficiently. The main aspect of Six Sigma for enhancement in the manufacturing industry is to maximize the financial returns.

Author(s):  
MEHDIUZ ZAMAN ◽  
SUJIT KUMAR PATTANAYAK ◽  
ARUN CHANDRA PAUL

This paper discusses the implementation of Six-sigma methodology in reducing rejection in a welding electrode manufacturing industry. The Six-sigma DMAIC (define– measure – analyse –improve – control) approach has been used to achieve this result. This paper explains the step-by-step approach of Six-sigma implementation in this manufacturing process for improving quality level. This resulted in reduction of rejection, and thus, reduced the Defect Per Million Output (DPMO) from 28356.96 to 1666.67. This had resulted in increasing the sigma level from 3.41 to 4.43, without any huge capital investment. During this study, data were collected on all possible causes and was analysed and thereby conclusions were made. Implementation of Six-sigma methodology has resulted in large financial savings for the industry.


2012 ◽  
Vol 622-623 ◽  
pp. 472-477
Author(s):  
Ali A. Karakhan ◽  
Angham E. Alsaffar

The aims of this study are to measure the defect rate and analyze the problems of production of ready concrete mixture plant by using Six Sigma methodology which is a business strategy for operations improvement depending basically on the application of its sub-methodology DMAIC improvement cycle and the basic statistical tools where the process sigma level of concrete production in the case study was 2.41 σ.


2016 ◽  
Vol 7 (3) ◽  
pp. 294-323 ◽  
Author(s):  
Samsul Islam

Purpose This study aims to expand the current knowledge of the Six Sigma approach in a period of time when there is little direct evidence of the need to improve the credit card account opening process. This is an important but neglected area of focus in the Six Sigma literature. This study explores the extent to which process improvement practices are extended to the credit card department. Design/methodology/approach A case study methodology is adopted in this study to facilitate an exploration of the implemented Six Sigma approach in the credit card department of a leading commercial bank. The process improvement tool used is the define, measure, analyze, improve and control (DMAIC) cycle. Findings The study’s results confirm that the Six Sigma approach improves the quality of the credit card account opening process. So, the Six Sigma approach can account for a reduced number of keying-in errors, resulting in better data accuracy and improved customer satisfaction. Research limitations/implications The authors, in an attempt to render the study results more feasible for data collection, have chosen to focus on the process of the new accounts unit of the credit card department. Therefore, the authors have not taken into account the other units (e.g. transaction processing) of the same department. Practical implications The results of this study will be useful in persuading bank management to evaluate and implement the Six Sigma approach. Hence, this research will assist bank managers with replies to questions, such as: “What impact will Six Sigma have on process-centric improvement, such as the new accounts opening process of a credit card department?” Originality/value Within the literature on the Six Sigma practice, there is little research that focuses on the implementation of this particular toolset especially for credit card departments. This indicates a gap in the field. A new contribution to bridging that gap comes from the analysis of the results for the Six Sigma concept, which addresses the new accounts opening process.


Author(s):  
Darshak A. Desai ◽  
Aurangzeb Javed Ahmed Shaikh

PurposeThis paper, a case study, aims to illustrate the application of Six Sigma in a small-scale ceramic manufacturing industry. The purpose of this paper is to demonstrate the empirical application of DMAIC methodology to reduce failure rate at high voltage (HV) testing of one of the most critical products, insulator.Design/methodology/approachThe case study is based on primary data collected from a real-life situation prevailing in the industry. The case study methodology adopted here is at one small-scale unit wherein the authors have applied DMAIC methodology and observed and recorded the improvement results, especially, reduction in failure rate at HV testing of insulator and, thus, increase in Sigma level.FindingsThe results found after implementation of the solutions are very significant. The rejection percentage has been reduced from 0.5 to 0.1 percent and consequently the Sigma level has been improved from 4.4 to 5.0.Research limitations/implicationsThis success story can be a guiding roadmap for other such industries to successfully implement Six Sigma to improve quality, productivity and profitability.Practical implicationsThis case study will serve as one of the resource bases for the industries which have till not implemented Six Sigma and benefited from the same.Social implicationsImproved quality and productivity leads to better economy. This case will help industries to serve the society with better economy with improved quality and productivity.Originality/valueThough ceramic industries in India are having enormous potential for growth, majority of them, especially, small and medium industries are either not aware of or not implementing Six Sigma to reap its multidimensional benefits of improving quality, productivity and profitability. This study highlights the benefits reaped by small-scale ceramic manufacturing industry opening up the avenues for its application at other such organizations.


Author(s):  
George Leal Jamil ◽  
Rodrigo Almeida de Oliveira

This chapter proposes the application of computer simulation models for the evaluation of software quality improvement through the implementation of policies and practices of software development processes and performing the measurement of the evolution of the quality through the Six Sigma methodology. In order to provide decision makers of process improvement, a model of dynamic simulation of systems was proposed. Model validation was performed using data collected from various projects developed in an information technology company headquartered in Belo Horizonte-MG. The models mentioned in this chapter are able to provide the decision makers a tooling of process improvement able to perform predictions, predictions, analysis of “what if” scenarios in the model. As a result of this work, a dynamic simulation model of systems capable of performing the evaluation of software quality in Sigma level is found. Also, there are comparisons and analyses of actual data of software development projects with the simulation data of the models presented. The earnings with the new version of the case exceed by more than 50% the Sigma level, the quality of software developed, and reduction of more than 55% of the time of development of the project.


Author(s):  
Suresh Subramoniam ◽  
Venky Shankararaman ◽  
K. V. Krishnankutty ◽  
Ravi Chinta

In this chapter, the authors establish the existence of a synergistic relationship between two complementary methodologies, Business Process Management (BPM) and Six Sigma, through literature review and suggest methods to exploit the same. Six Sigma provides incremental improvement through its analytical abilities and is complemented by BPM which provides the data from the ongoing processes on a real time basis. The authors discuss two perspectives on how to synergize these methodologies. Firstly, achieve hybrid BPM-Six Sigma by substituting Improve and Manage steps of BPM with the DMAIC of Six Sigma methodology. Secondly, utilize Six Sigma methodology for analysis on data generated by BPM. The application of the integration of BPM and Six Sigma is presented through case studies from financial services companies. The authors also present the key features of BPM tools that can assist Six Sigma in every phase of its implementation.


Author(s):  
Robson Ferreira de Souza ◽  
Luciane G. Tomaz ◽  
Vicente J. C. Real ◽  
Tatiana Malafaia Cardoso

One of any company’s major assets is information and there is no information without data. In this regard, there are numerous market solutions for maintenance data records. At times, data quality is not satisfactory and this prevents obtaining information, thus jeopardizing reliability of the assets, affecting efficacy of a company’s management decisions and causing serious problems. This article aims to explain the use of the six sigma methodology to improve quality in maintenance records in the Natural Gas Department of Transpetro. To this end, the Maintenance Record Improvement Project was created, which involved plotting the execution process and maintenance records, development of portable tools for field records, redefining execution and management of routine maintenance processes, workforce training and cultural change. The article demonstrates how improvement opportunities were identified, mapping and measuring gaps, analysis of needs jointly with ways for treating them and preparing the action plan to prioritize the correction of deviations. In order to control the process, an indicator was developed to monitor progress in the quality of completing the records in the diverse Work Centers in the Transpetro Natural Gas Department (DGN) maintenance area.


Author(s):  
Pavol Gejdos

This article deals about the application of the Six Sigma methodology by using modern methods in various stages of the DMAIC improvement model. The change management of business processes in terms of quality is determined by the correct choice of methods and tools for reducing discrepancies and non-productive costs. The evaluation of selected processes of furniture production through defects per million opportunities, efficiency, capability and sigma level before the change and after the change in the quality process provides relevant information for ensuring continuous quality improvement. Implementation of assessing changes in the process is a source of information for continuous improvement of process performance. Keywords: Processes, quality improvement, Six Sigma, DMAIC, changes in processes.


Author(s):  
Deepinder Singh ◽  
Virender Singh ◽  
Harwinder Singh ◽  
Jagdeep Singh

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