ENERGY-CONSCIOUS PRODUCTION SCHEDULING FOR FABRICATED METAL PRODUCTS: A MIXED-INTEGER PROGRAMMING APPROACH

Bobby Kurniawan (Department of Industrial Engineering, Universitas Sultan Ageng Tirtayasa)
Melina Melina (Department of Industrial Engineering, Universitas Sultan Ageng Tirtayasa)
Yusraini Muharni (Department of Industrial Engineering, Universitas Sultan Ageng Tirtayasa)

Trends in Mechanical Engineering Research
Vol 4, No 1 (2026): JUNE

Energy is a fundamental requirement in the metal fabrication industry. However, energy consumption is rarely taken into account in production scheduling decisions. In fact, a well-designed production schedule can contribute significantly to energy conservation. Therefore, production scheduling must explicitly consider energy consumption. This study proposes an energy-conscious production scheduling system for a fabricated metal products industry. The production system under study exhibits the characteristics of a hybrid flow shop, and thus the problem is modeled as a hybrid flow shop scheduling problem. To solve this problem, the mixed-integer programming (MIP) method is employed to solve the hybrid flow shop scheduling model. The results demonstrate an energy cost saving of 0.66% compared to the scheduling practice currently in use.