Riansyah, R., Sitanggang, B. E. I., & Juliana, M. (2026). Soft Time-Window Constraints in Crystal-Ice Distribution: A Cheapest-Insertion VRPTW Case Study with Non-Refrigerated Vehicles. Sinergi International Journal of Logistics, 4(3). https://doi.org/10.61194/sijl.v4i3.1106