Quality Evaluation of Al-Rasheed Ready Concrete Mixture Plant By Using Six Sigma Approach
Main Article Content
Abstract
The objective of this research work is to evaluate the quality of central concrete plant of Al-Rasheed Company by using Six Sigma approach which is a measure of quality that strives for near elimination of defects using the statistical methods to improve outputs that are critical to customers. The fundamental objective of Six Sigma methodology is the implementation of a measurement-based strategy that focuses on process improvement and variation reduction to reach delighting customers, and then suggesting an improvement system to improve the production of concrete in Al-Rasheed State Contracting Construction Company.
A field survey includes two parts (open and close questionnaire) that aimed to get the data and information required for achieving the research where the answers of questionnaire sample have led, during the application of DMAIC improvement cycle, to identifying the potential possible reasons that caused quality deviations in concrete works. Two programs have been used: First, ‘Sigma Level Calculator’ which is formulated by the researcher to measure the components of the processes performance. Second, ‘QI Macros Lean Six Sigma SPC Software 2011’ which uses the statistical tools of Six Sigma DMAIC methodology for: identifying the root causes of defects, analyzing the data, determining capability and stability of process. It is concluded that the processes sigma level for the concrete works quality is 2.41 σ and 181,070 DPMO which is considered too bad as compared with the current global competitio
Article Details
How to Cite
Publication Dates
References
Arthur, Jay, (2004), “Six Sigma Simplified”, Third Edition, LifeStar Publishing, USA.
Chen, K. S.; Hsu, C. H.; and Ouyang, L. Y., (2006),” Applied Product Capability Analysis Chart in Measure Step of Six Sigma”, Quality and Quantity, Vol. 41, No. 3, pp. 387-400, Springer.
Chowdhury, Subir, (2001), “The Power of Six Sigma”, First Edition, Dearborn Trade Publishing,
USA. Contract Conditions, (2005), “The First and Second Parts of Contract Conditions for Civil Engineering Works”, Legal Office, Ministry of Planning, Baghdad, Iraq.
Ferrin, D.; Miller, D.; and Muthler, M., (2002), “Six Sigma and Simulation, so What is the Correlation”, Proceedings of the 2002 Winter Simulation Conference.
Hasan, Ali, Amer, M., (2011), “Quality Evaluation of Construction Factories by Using Six Sigma Approach”, MSc Thesis Submitted to the Civil Department, College of Engineering, University of Baghdad.
Kessler, Rafael, Motta; and Padula, Antonio, Domingos, (2005), “The Implementation of Six Sigma in Manufacturing Organizations: Motivations and Results Achieved”, Brazilian Journal for Business and Management, Vol. 4, No. 2, pp. 11-20, FUMEC University, Brazil.
Klefsjö, B.; Bergquist, B.; and Edgeman, R.L., (2007), “Six Sigma and Total Quality Management: Different Day, Same Soup”, International Journal of Six Sigma and Competitive Advantage, Vol. 2, No. 2, pp. 162-178, Copyright: Inderscience Enterprises Ltd.
Nyrén, Gustav, (2007), “Product Development According to Six Sigma and the DMAIC Improvement Cycle”, MSc Thesis Submitted to the Department of Business Administration and Social Sciences, Industrial Business Administration, Leleå University of Technology.
Pande, Pete; and Holpp, Larry, (2002), “What is Six Sigma”, McGraw-Hill company, Inc., USA.
Park, Sung, H., (2003), “Six Sigma for Quality and Productivity Promotion”, Asian Productivity Organization APO, Tokyo, Japan.
Pheng, Low, Sui; and Hui, Mok, Sze, (2004), “Implementing and Applying Six Sigma in Construction”, Journal of Construction Engineering and Management, Vol. 130. No. 4, pp. 482-489, ASCE.
Schroeder, Roger, (2008), “Operation Management: Contemporary Concepts and Cases”, Third Edition, McGraw-Hill company,
Inc.
Stevenson, William J., (2005), “Operation Management”, Eighth Edition, McGraw-Hill Irwin companies Inc., NY, USA.
Tehrani, Maryam, Dabbaghi, (2010), “Performance Improvement in Construction Project based on Six Sigma Principles”, MSc Thesis Submitted to the Department of Quality and Environmental Management, Industrial Engineering, University of Borås, Sweden.