TY - JOUR ID - 895 TI - Optimizing and Solving Project Scheduling Problem for Flexible Networks with Multiple Routes in Production Environments JO - Journal of Quality Engineering and Production Optimization JA - JQEPO LA - en SN - AU - Birjandi, A. AU - Mousavi, S. Meysam AU - Hajirezaie, M. AU - Vahdani, Behnam AD - Faculty of Industrial Engineering, South Tehran Branch, Islamic Azad University AD - Department of Industrial Engineering, Faculty of Engineering, Shahed University AD - azad university of ghazvin Y1 - 2019 PY - 2019 VL - 4 IS - 1 SP - 175 EP - 196 KW - Flexible production networks KW - RCPSP KW - Production projects KW - Production scheduling problem KW - Mathematical model KW - Meta-heuristic algorithm KW - Multiple routes DO - 10.22070/jqepo.2019.3870.1091 N2 - In production environments, multi-route Resource-Constrained Project Scheduling Problem (RCPSP) is more complex and consists of two types of flexible and fixed parts. The flexible parts comprise the semi-finished products and each part has multiple routes denoted independently with activities and predictive relationships. This research develops a new Mixed‐Integer Nonlinear Programming (MINLP) model to minimize the makespan. The proposed mathematical model identifies the optimal routes and, consequently, determines the optimal project network. Also, it allocates renewable resources to each production activity. Production sequencing of activities is optimized by the proposed model. A new hybrid approach by regarding GA and PSO in a binary solving space is introduced to handle two main sub-problems of RCPSP-MR in production environments, namely route selection and production scheduling. To evaluate the presented optimization model and algorithm, 60 test problems in various sizes are reported in detail. UR - https://jqepo.shahed.ac.ir/article_895.html L1 - https://jqepo.shahed.ac.ir/article_895_8136778a25d98d062681e3505d078040.pdf ER -