Improving Rebar Production Processes Through Six Sigma Methodology

Mahmud M. Abushalla; Hitem A. Aswihli; Jamal Ben Sasi; Faraj Eldabee; Fouzi Alhadar

doi:10.26629/

Authors

Mahmud M. Abushalla Misurata University Author
Hitem A. Aswihli Al Asmarya Islamic University Author
Jamal Ben Sasi Department of Industrial and Manufacturing Engineering, Engineering Faculty, Misurata University, Misurata, Libya, Author
Faraj Eldabee Department of Mechanical and Industrial Engineering, Faculty of Engineering, University of Tripoli, Libya Author
Fouzi Alhadar Department of Technology, The Higher Institute for Technical Sciences Tarhuna, , Tarhuna, Libya Author

DOI:

https://doi.org/10.26629/

Keywords:

Control Maps, Defects, Pareto Analysis, Six Sigma, Steel Bars, Thermo-Mechanically Treated

Abstract

Improving productivity and reducing waste in manufacturing processes is a primary objective for all industrial organizations. Theoretical Six Sigma calculations were applied to actual data collected from the heat-treated and mechanically treated (TMT) steel bar plant of the Libyan Iron and Steel Company (LISCO). This was achieved by applying the Six Sigma (Definition, Measurement, Analysis, Improvement, and Control) methodology and using tools such as control charts, Pareto analysis, cause-and-effect diagrams, and SPSS software, with the aim of optimizing the manufacturing process of heat-treated and mechanically treated steel bars. The results obtained from the applied calculations showed a promising level of improvement, with the production waste rate decreasing to approximately 1.7%. The process parameters affecting the mechanical properties of heat-treated and mechanically treated steel bars were also identified. Therefore, it can be concluded that the study has yielded valuable and encouraging results.

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Author Biographies

Hitem A. Aswihli, Al Asmarya Islamic University

Assistant Professor, Faculty Member, Department of Mechanical and Industrial Engineering, Al-Asmariya Islamic University, Zliten
Jamal Ben Sasi, Department of Industrial and Manufacturing Engineering, Engineering Faculty, Misurata University, Misurata, Libya,

Associate Professor and Faculty Member, Department of Industrial Engineering, Faculty of Engineering, Misrata University
Faraj Eldabee, Department of Mechanical and Industrial Engineering, Faculty of Engineering, University of Tripoli, Libya

Associate Professor and Faculty Member, Department of Mechanical and Industrial Engineering, Faculty of Engineering, University of Tripoli
Fouzi Alhadar, Department of Technology, The Higher Institute for Technical Sciences Tarhuna, , Tarhuna, Libya

Assistant Professor and Faculty Member, Department of Technology, Higher Institute of Technical Sciences, Tarhuna