Improving the Return Loading Rate Problem in Northwest China Based on the Theory of Constraints

Abstract

This paper introduces how to improve the return loading rate problem by integrating the Sub-Tour reversal approach with the method of the Theory of Constraints (TOC). The proposed model generates the initial solution derived by the Sub-Tour reversal approach in phase 1 and then applies TOC to obtain the optimal solution, meeting the goal of improving the return loading rate to more than 50% and then lowering the total transportation distance in phase 2. To see our model capability, this study establishes an original distribution layout to compare the performance of the Sub-Tour reversal approach with our model, based on the simulation data generated by the Monte Carlo simulation. We also conduct the pair t-test to verify our model performance. The results show that our proposed model outperforms the Sub-Tour reversal approach in a significant manner. By utilizing the available data, our model can be easily implemented in the real world and efficiently seeks the optimal solutions.

Integrating the Theory of Constraints and Six Sigma: Process Improvement Implementation

“…It has been seen that studies in the literature about the TOC are conceptual, the application of TOC principles to different theoretical problems, the comparison of TOC philosophy with different systems and TOC applications (Rahman, 1998). The TOC has been applied to many fields; the manufacturing sector (Ünal, Tanış & Küçüksavaş, 2005;Demircioğlu & Akkaya, 2016;Wolniak, Skotnicka-Zasadzien, & Zasadzien, 2018;Urban & Rogowska, 2018;Rojas, Jurado, & Londono, 2018;Sorkun, 2018;Urban, 2019;Garza, et al, 2019;Akçimen & Antmen, 2019;Aiastui, Perez de Eulate, & Guisasola, 2020;Al-Fasfus, Hamza, & Elkotayni, 2020;Karakoç & Şık, 2021;Mahdi, Abboud & Hussain, 2021), the service sector (Taştan & Demircioğlu, 2015;Akbulut & Ertan, 2015;Ayanoğlu & Şakar, 2015;Yükçü & Yüksel, 2015;Escobar, Vega, & Zamora, 2016;Grida & Zeid, 2019), supply chains (Harish, 2019;Kelly & Germain, 2020;Huang, Lu & Dang, 2021), project management (Mishra, 2020;Sarkar, Jha & Patel, 2021), product mix decisions (Ünal et al, 2005;Kaygusuz, 2005;Mehdizadeh & Jalili, 2018) and human resources management (Tekin & Şahin, 2014;Alghaithi & Sartawi, 2020). 6σ is a systematic approach that aims to increase business profitability, performance, production and customer satisfaction, as well as to reduce the operational costs of the business.…”