Hizmet İşletmelerinde Altı Sigma Uygulamaları: Literatür Araştırması

Yıl 2012, Sayı: 27, 327 - 338, 01.02.2012

Hilmi Yüksel

Öz

Kusurlu ürünlerin kaçınılmaz olduğu anlayışınıkesinlikle kabul etmeyen altısigma felsefesine göre amaç, ilk seferde kusursuz ürünlerin üretilmesini sağlamak ve müşteri beklentilerini karşılayarak ve değişkenliği azaltarak milyonda 3,4 hataya ulaşmaktır. Altısigma yaklaşımıilk olarak 1980’li yıllarda Motorola fabrikasında ileri sürülmüşve daha sonra da üretim işletmelerinde yaygın olarak kullanılmıştır. Altısigma yaklaşımıile üretim işletmeleri ürün kalitesini artırmak, süreçlerin verimliliğini yükseltmek, maliyetleri düşürmek için çok önemli fırsatlar elde etmişlerdir. 2000’li yıllar ile birlikte hizmet işletmeleri de altısigma uygulamalarınıgerçekleştirmeye başlamışlardır. Özellikle sağlık sektöründe ve finans sektöründe başarılıaltısigma uygulamalarıgerçekleştirilmiştir. Bununla birlikte hizmet süreçlerinin üretim süreçlerine göre faklıkarakteristikleri hizmet süreçlerinde altısigma uygulamalarında bazıgüçlüklerle karşılaşılmasına neden olmaktadır. Bu güçlüklere bağlıolarak da hizmet işletmelerinde altısigma uygulamalarında özel başarıkriterlerinin değerlendirilmesi gerekmektedir. Bu çalışmada hizmet sektöründe de altısigma uygulamalarının artmasına bağlıolarak literatür araştırmasıdoğrultusunda hizmet süreçleri ile üretim süreçlerinde altısigma uygulamalarının nasıl farklılaştığı, hizmet sektöründe altısigma uygulamalarında karşılaşılan güçlükler ele alınarak hizmet işletmelerinde altısigma uygulamalarıiçin başarıkriterleri değerlendirilmiştir. Hizmet işletmelerinde de altısigma uygulamalarının etkinliğinin artırılmasıiçin bu başarıkriterlerinin belirlenip değerlendirilmesi önem kazanmaktadır.

Anahtar Kelimeler

Altısigma, hizmet süreçlerinin iyileştirilmesi

Six Sigma Applications in Service Firms: A Literature Review

Öz

The aims of the six sigma philosophy which doesn’t accept the idea of the defects are inevitable in the processes are to produce defects free at he first time and to reach to the goal of 3,4 defects per million opportunities by minimizing the variation and meeting the customers’ expectations. Six sigma has been firstly applied in Motorolo in 1980s and then it has been widely used by other manufacturing firms around the world. By six sigma applications, the manufacturing companies had many opportunities to increase product quality, productivity of the processes and to decrease costs. By the applications of six sigma in the organizations, the customers’ satisfaction can be increased as well as the organization can gain many financial benefits. According to Pyzdek 2003;5 the firms which are at 3 or 4 sigma level spend the 25-40 percentage of their revenue for fixing the problems. The firms which are at the six sigma level spend less than 5 percentage of their revenue for fixing the problems. By the 2000s’ the service firms also started to apply six sigma in their processes. Particularly, healthcare and financial companies had many successful six sigma applications. Six sigma can be applied in service firms successfully however service firms can meet with many difficulties related with the characteristics of the service firms. Depending on these difficulties the service firms should evaluate the critical success factors of six sigma applications in service processes. In this paper, depending on the literature review the success factors for six sigma applications in service firms have been evaluated according to the differences of the manufacturing firms and service firms in the application of six sigma and the difficulties that the service firms meet while applying six sigma projects. Evaluating the success factors for six sigma applications in service firms is important for increasing the efficiency of six sigma applications in service firms. According to literature, many service firms operate at the 1,5-3 sigma level. So, six sigma methodology present many opportunities for service firms to decrease their defects and to increase six sigma level. In the literature there are many success stories about the application of six sigma methodology. These examples are mainly from healthcare and financial sector. In addition, there are some six sigma application examples in the service departments of manufacturing firms such as human resources department, in education and in the activities of municipality. Evaluating service quality is more difficult than evaluating the product quality and service quality is related with the differences between the perceptions of the customers about the service and the expectations of the customers from the service. The main characteristic of service firms is variability. Due to variability in service processes , there can be many difficulties in the applications of six sigma in service firms. Service firms may meet with many difficulties in the measure phase of the six sigma methodology. In many applications, the data is not ready for the analysis and the characteristics of the data may cause not to able to use statistical techniques extensively. In service firms, which data will be gathered, how data will be gathered and which analyses will be done are very important steps in six sigma applications in service firms. If these steps can be done successfully one of the challenges in the application of six sigma in service firms can be eliminated. According to the literature one of the difficulties in the application of six sigma in service firms is about defining the process parameters. In addition to these difficulties, to define and to quantity the defects are not easy in service processes and generally it is related with the personel. The defects in six sigma applications in service firms are related with customers’ satisfaction and the examples of the defects in service firms may be long lead time, inadequate quality and high cost. In order to determine these problems it is necessary to have a picture of the service processes to specify how these process are good to meet the customers’ expectations. According to literature, for the success of the six sigma applications, the support of the management is very important. In the applications of six sigma in service firms, the management must support six sigma applications by investing for six sigma applications, by separating resources for six sigma applications and by providing the involvement of all of the personnel in the organization. Cultural exchange must be provided for six sigma applications. However this cultural exchange for six sigma applications may be more difficult in service firms than manufacturing firms. According to literature use of the flow diagrams and process maps are not used commonly in service firms. In addition the use of experimental design in the six sigma application in service firms is very limited. 5S, visual control, value stream mapping can be applied in service firms successfully. SIPOC, project charter and critical index matrix have got important roles for the success of the six sigma projects. The statistical techniques can’t be used so commonly due to the characteristics of data in service firms. Generally the data is not normally distributed and not in process is no control. Because of this factor, nonparametric techniques can be used for statistically analyses in six sigma applications. Service firms meet with many difficulties in the application of six sigma. However this doesn’t mean that six sigma can’t be successful in service firms. There are many service firms which decrease their cost and improve the efficiency of their processes and quality of their products. The application of six sigma in service firms may be more difficult than the applications in manufacturing firms because of the characteristics of the service firms. If the difference in characteristics of service firms than manufacturing firms can be understood, many difficulties in the application of six sigma in service firms can be minimized. In the beginning it is suggested to use simple statistical techniques and to use basic six sigma methods. The service firms can also earn many benefits by using basic six sigma methods. By seeing the benefits of six sigma applications such as increasing the efficiency of service processes, decreasing the defects, waiting times and costs through the organization six sigma methods which are more complex can be used and by gathering quantative data, the efficiency of these methods can be increased.

Anahtar Kelimeler

Six sigma, Process improvement in service firms

Kaynakça

• Antony J., (2004); “Six Sigma in the UK Service Organizations: Results from a Pilot Survey”, Managerial Auditing Journal, Vol:19,No:8
• Antony J.,Antony F.J., Kumar M.,Cho B.R., (2007), “Six Sigma in Service Organizations Benefits, Challenges and Difficulties ,Common Myths, Empirical Observations and Success Factors”, International Journal of Quality & Reliability Management, Vol:24,No:3
• Balbontin A.A.,(2006); “Application of Six Sigma in the Banking Industry” World Class Applications of Six Sigma, (Editörler: Antony J., Banuelas R., Kumar A)., Elsevier Ltd, USA
• Bandyopadhyay J.K. Coppens K.,(2005), “Six Sigma Approach to Healthcare Quality and Productivity Management”, International Journal of Quality & Productivity Management, Vol:5,No:1
• Banuelas, R. and Antony, J., (2002), “Critical Success Factors for the Successful Implementation of Six Sigma Projects In Organizations”, The TQM Magazine, Vol. 14 No. 2
• Brue G., Howes R.,(2006), The McGraw Hill 36-Hour Course, Six Sigma, McGraw Hill Inc, USA
• Chakrabarty A., Chuan T.K., (2007); “The Current State of Six Sigma Application in Services”, Managing Service Quality ,Vol:17, No:2
• Chakrabarty A., Chuan T.K., ,(2008), “Case Study Analysis of Six Sigma in Singapore Service Organizations”, IEEE
• Chakrabarty A., Chuan T.K., (2009) , “An Exploratory Qualitative and Quantitative Analysis of Six Sigma in Service Organizations in Singapore”, Management Research News, Vol:32,No:7
• Cherry J., Seshadri S., (2000), “Six Sigma :Using Statistics to Reduce Process Variability and Costs in Radiology”, Radiology Management, November-December
• Does R., Van der Heuvel E., Mast J., Bisgard S., (2002); “Comparing Nonmanufacturing with Traditional Applications of Six Sigma”, Quality Engineering, Vol:15, No:1
• Furterer S., Elshenawy A.K., (2005); Implementing of TQM and Lean Sigma Tools in Local Goverment: A Framework and a Case Study”, Total Quality Management,Vol:16, No:10
• George M.L., (2003), Lean Six Sigma for Service—How to Use Lean Speed and Six Sigma Quality to Improve Services and Transactions,Mc Graw Hill Inc,USA
• Haik B.E., Roy D.M., (2005), Service Design for Six Sigma A Roadmap for Excellence, Wiley Interscience Publication, USA
• Heckl D., Moormann J.,Rosemann M., (2010), “Uptake and Success Factors of Six Sigma in the Financial Services Industry”, Business Process Management Journal Vol. 16 No. 3
• Hensley R., Dobie K., (2005); “ Assessing Readiness for Six Sigma In a Service Setting”, Managing Service Quality, Vol:15,No:1
• Johannsen F., Leist S., Zellner G.,(2010) “Six sigma as a Business Process Management Method in Services: Analysis of the Key Application Problems”, Information Systems and E-Business Management ,Vol:9,No:3
• Johannsen F.,Leist S., (2009), “ A Six Sigma Approach for Integrated Solutions”, Managing Service Quality, Vol:19,No:5
• Johnson, A., Swisher, B., (2003), “How Six Sigma Improves R&D”,Research Technology Management, Vol:46, No:2
• Koning H., Does J.M.M., (2008), “Lean Six Sigma in Financial Services”, Int. J. Six Sigma and Competitive Advantage, Vol. 4, No. 1
• Kwak, Y.H., Anbari, F.T., “Benefits, Obstacles, and Future of Six Sigma Approach” Technovation, 26
• Lopez L., (2006)”Six Sigma in Healthcare: A Case Study with Common Wealth Health Corporation” World Class Applications of Six Sigma, (Editörler: Antony J., Banuelas R., Kumar A)., Elsevier Ltd, USA
• Maleyeff J.,(2007), “Improving Service Delivery in Government with Lean Six Sigma”, Strategy and Transformation Series, IBM Center for The Business of Government, http://www.businessofgovernment.org/sites/default/files/MaleyeffReport.pdf
• McCarty T., Bremer M., Daniels L., Gupta P., (2004), The Six Sigma Black Belt Handbook, Mc Graw Hill Inc., USA
• Noone B.M., Namasivayam K., Tomlinson H.S., (2010), “Examining the Application of Six Sigma in the Service Exchange”, Managing Service Quality, Vol:20, No:3
• Pande PS, Neuman RP, Cavangh RR.,(2000), The Six Sigma Way: How GE, Motorola, and Other Top Companies are Honing Their Performance. NY: Mc Graw Hill.
• Pyzdek T., (2003), The Six Sigma Handbook, Mc Graw Hall Inc, USA
• Snee R.D., (2006), “Increasing Newspaper Accuracy Using Six Sigma Methodology” World Class Applications of Six Sigma, (Editörler: Antony J., Banuelas R., Kumar A)., Elsevier Ltd, USA
• Stamatis D.H., (2003), Six Sigma for Financial Professionals, John Willey & Sons Inc.,USA
• Taner M.T., Sezen B., Antony J.,(2007), “An Overview of Six Sigma Applications In Healthcare Industry”, International Journal of HealthCare Quality Assurance,Vol:20,No:4
• Tang L.C., Lam S.W., Goh T.N., (2008),“A Tasks-based Six Sigma Roadmap for Healthcare Services”, Handbook of Performability Engineering,(Editör:Krishna B.Misra) Springer, Spain
• Wyper B., Harrison, (2000) “Deployment of Six Sigma Methodology in Human Resource Function: A Case Study”, Total Quality Management& Business Excellence, Vol:11,No:4
• Yang K., (2005), Design for Six Sigma for Service, McGraw Hill Inc, USA