Evaluating liquid soap product quality using process capability indicators and statistical control charts / case study
Keywords:
Capability, LCL, Process, Quality, UCLAbstract
Maintaining product quality and identifying deviations in the event of their occurrence is one of the most important topics in industry, as it forms the basis for the success and continuity of an industrial project. This study aims to measure and analyze the production capacity of the process and monitor the quality of the processes through its indicators. It also aims to identify and diagnose the causes of deviations in production capacity through the quality control process and address the causes of these deviations. The study followed a descriptive-analytical approach as a scientific method to arrive at its findings. Researchers selected a detergent manufacturing company as a sample for the study, given the product's importance in daily life and its constant demand. Data were collected through field observations, a review of production records, and interviews with production managers. The researchers used statistical control charts and graphical results to determine the extent of process deviation. The study found that the Cp value was 3.03, while the Cpk index was 2.99, indicating that the process mean was far from the target, leading to process variation. The study recommended that tolerance limits should be reduced, as setting large tolerance limits for the manufactured product (±15) affects process quality.
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Rasib, A. H. A., Musazzali, M., Abdullah, R., Boejang, H., Hanizam, H., & Rafaai, Z. F. M. (2023). Process Capability Study for Improvement of Product Reliability At Food and Beverage Industry. Journal of Engineering Science and Technology, 18(1), 357–375.
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Setiono, B. A., & Hidayat, S. (2022). Influence of Service Quality with the Dimensions of Reliability, Responsiveness, Assurance, Empathy and Tangibles on Customer Satisfaction. International Journal of Economics, Business and Management Research, 06(09), 330–341. https://doi.org/10.51505/ijebmr.2022.6924
Tirtayasa, S. (2022). The Effect Of Product Quality, Price, And Innovation On Marketing Performance Moderated Consumer Purchasing Power In UMKM Of Boba Drinks In Deli Serdang. International Journal of Science, Technology & Management, 3(6), 1731–1742. https://doi.org/10.46729/ijstm.v3i6.642
Wang, L., Bo, G., Du, M., & Cheng, H. (2024). Investigating the Effect of Small Sample Process Capability Index Under Different Bootstrap Methods. International Journal of Advanced Computer Science and Applications, 15(4), 547–555. https://doi.org/10.14569/IJACSA.2024.0150457
Zacharias, M. (2022). The Importance of Quality Control for The Success of A Company. Asian Journal of Logistics Management, 1(2). https://doi.org/10.14710/ajlm.2022.16787
Zwetsloot, I. M., Jones-Farmer, L. A., & Woodall, W. H. (2024). Monitoring univariate processes using control charts: Some practical issues and advice. Quality Engineering, 36(3), 487–499.
Alordiah, C., & Oji, J. (2024). Test equating in educational assessment: a comprehensive framework for promoting fairness, validity, and cross-cultural equity. Asian Journal of Assessment in Teaching and Learning, 14(1), 70–84.
Alsabbagh, A. A. A. (2023). Evaluating the Quality of Delivery Service From the Customer’S Point of View Using the Importance-Performance Matrix. International Journal of Professional Business Review, 8(4), 1–16. https://doi.org/10.26668/businessreview/2023.v8i4.1742
Alwan, A. S., & Jasim, N. A. (2023). Measuring and Analyzing the Process Capability of Productivity – An Applied Study in the Al-Tahady Factory for the Production of Filters. Iraqi Journal of Industrial Research, 10(3). https://doi.org/10.53523/ijoirvol10i3id362
Benková, M., Bednárová, D., & Bogdanovská, G. (2024). Process Capability Evaluation Using Capability Indices as a Part of Statistical Process Control. Mathematics, 12(11). https://doi.org/10.3390/math12111679
Chituru, C. M., Ho, S. B., & Chai, I. (2024). Integrating Spatial Computing with Clinical Pathology for Enhanced Diagnosis and Treatment Informatics in Healthcare. International Journal on Informatics Visualization, 8(3–2), 1762–1771. https://doi.org/10.62527/joiv.8.3-2.2951
Dimitrova, K., Panayotova, T., & Veleva, N. D. (2021). Model for Research into the Factors Influencing the Effective Planning and Management of Production Capacity. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA, 5(1). https://doi.org/10.29114/ajtuv.vol5.iss1.237
Dogan, O., & Areta Hiziroglu, O. (2024). Empowering Manufacturing Environments with Process Mining-Based Statistical Process Control. Machines, 12(6), 1–18. https://doi.org/10.3390/machines12060411
Hoe, L. C., & Mansori, S. (2018). The Effects of Product Quality on Customer Satisfaction and Loyalty: Evidence from Malaysian Engineering Industry. International Journal of Industrial Marketing, 3(1), 20. https://doi.org/10.5296/ijim.v3i1.13959
Kiran, K., Karaman, C., Aksoy, V., & Lapeva-Gjonova, A. (2017). Two new species of the “ultimate†parasitic ant genus Teleutomyrmex KUTTER, 1950 (Hymenoptera: Formicidae) from the Western Palaearctic. Myrmecological News, 25(October), 145–155.
Kuo, T. I., & Chuang, T. L. (2023). Process Capability Control Charts for Monitoring Process Accuracy and Precision. Axioms, 12(9), 1–18. https://doi.org/10.3390/axioms12090857
Kwilinski, A., & Kardas, M. (2023). Enhancing Process Stability and Quality Management: a Comprehensive Analysis of Process Capability Indices. Virtual Economics, 6(4), 73–92. https://doi.org/10.34021/ve.2023.06.04(5)
Lone, R. A., & Bhat, M. A. (2023). Impact of Product Quality on Customer Satisfaction: Evidence from Selected Consumer Durables. International Journal for Research Trends and Innovation, 8(4), 1014–1024.
Mahapatra, A. P. K., Song, J., Shao, Z., Dong, T., Gong, Z., Paul, B., & Padhy, I. (2020). Concept of process capability indices as a tool for process performance measures and its pharmaceutical application. Journal of Drug Delivery and Therapeutics, 10(5), 333–344. https://doi.org/10.22270/jddt.v10i5.4288
Nguyễn Văn Nhân, & Nguyễn Văn Lực. (2023). Service Quality Factors Impact on Customer Satisfaction: Research at Loc Lam Furniture Trading Service Co. Ltd. Malaysian Journal of Business, Economics and Management, October, 54–62. https://doi.org/10.56532/mjbem.v2i2.18
Ostadi, B., Taghizadeh-Yazdi, M., & Mohammadi-Balani, A. (2021). Process capability studies in an automated flexible assembly process: A case study in an automotive industry. Iranian Journal of Management Studies, 14(1), 1–37. https://doi.org/10.22059/IJMS.2020.222198.672415
Ottenstreuer, S., Weiß, C. H., & Knoth, S. (2021). Control charts for monitoring a Poisson hidden Markov process. Quality and Reliability Engineering International, 37(2), 484–501.
Power, T., East, L., Gao, Y., Usher, K., & Jackson, D. (2021). A mixed-methods evaluation of an urban Aboriginal diabetes lifestyle program. Australian and New Zealand Journal of Public Health, 45(2), 143–149. https://doi.org/10.1111/1753-6405.13092
Puja Whardana, G., Irwati, D., & Dwi Miharja, M. N. (2024). Analysis of Carton Packaging Quality Control Using Statistical Quality Control Methods at PT XYZ. International Journal of Innovative Science and Research Technology (IJISRT), 9(7), 212–221. https://doi.org/10.38124/ijisrt/ijisrt24jul580
Qader, H. M., Birdawod, H. Q., Qader, H. M., & Sedeeq, B. S. (2025). Capability Process to Optimize Specification by Impact of Wavelet Analysis. Cihan University-Erbil Journal of Humanities and Social Sciences, 9(1), 53–60. https://doi.org/10.24086/cuejhss.v9n1y2025.pp53-60
Rasib, A. H. A., Musazzali, M., Abdullah, R., Boejang, H., Hanizam, H., & Rafaai, Z. F. M. (2023). Process Capability Study for Improvement of Product Reliability At Food and Beverage Industry. Journal of Engineering Science and Technology, 18(1), 357–375.
Santos, E., Lima, T. M., & Gaspar, P. D. (2023). Optimization of the Production Management of an Upholstery Manufacturing Process Using Lean Tools: A Case Study. Applied Sciences (Switzerland), 13(17). https://doi.org/10.3390/app13179974
Setiono, B. A., & Hidayat, S. (2022). Influence of Service Quality with the Dimensions of Reliability, Responsiveness, Assurance, Empathy and Tangibles on Customer Satisfaction. International Journal of Economics, Business and Management Research, 06(09), 330–341. https://doi.org/10.51505/ijebmr.2022.6924
Tirtayasa, S. (2022). The Effect Of Product Quality, Price, And Innovation On Marketing Performance Moderated Consumer Purchasing Power In UMKM Of Boba Drinks In Deli Serdang. International Journal of Science, Technology & Management, 3(6), 1731–1742. https://doi.org/10.46729/ijstm.v3i6.642
Wang, L., Bo, G., Du, M., & Cheng, H. (2024). Investigating the Effect of Small Sample Process Capability Index Under Different Bootstrap Methods. International Journal of Advanced Computer Science and Applications, 15(4), 547–555. https://doi.org/10.14569/IJACSA.2024.0150457
Zacharias, M. (2022). The Importance of Quality Control for The Success of A Company. Asian Journal of Logistics Management, 1(2). https://doi.org/10.14710/ajlm.2022.16787
Zwetsloot, I. M., Jones-Farmer, L. A., & Woodall, W. H. (2024). Monitoring univariate processes using control charts: Some practical issues and advice. Quality Engineering, 36(3), 487–499.
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Published
2025-07-28
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AL-sabbagh, A., & Sadiq, B. H. (2025). Evaluating liquid soap product quality using process capability indicators and statistical control charts / case study . Journal of Management Science (JMAS), 8(3), 544–553. Retrieved from https://exsys.iocspublisher.org/index.php/JMAS/article/view/695
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