Our research objective is to lower intralogistics costs by minimizing the number of shuffling operations in a steel plant company commercial warehouse. The process of dispatching products consists of retrieving set of steel bar (SSB) from a floor stored stack or a special stacking frame by an overhead crane. To retrieve a targeted merchandise all SSB above targeted must be reshuffled. Proper assignment of storage locations is a key logistics problem for efficient order picking. We are comparing two heuristics, that do not require information of dispatching sequence of any stored products. We simulated the problem at hand with both methods. Our objective is to count the number of reshuffles using each heuristic on randomly generated examples and decide which is better in the long run. Our problem has similarities with storage assignment of steel plates or steel coils for minimization of reshuffling operations. The problem is also comparable to storage assignment of containers in a container yard. In our case we are dealing with a special stacking configuration of products, that demands different approach. We want to demonstrate which heuristic should be used in companies that lack necessary storage information infrastructure.
1. Avriel, M., Penn, M., & Shpirer, N. (2000). Container ship stowage problem: complexity and connection to the coloring of circle graphs. Discrete Applied Mathematics, 103(1), 271–279.
2. C.Q. Zhang, J.Y. Liu, Y.-w. Wan, K.G. Murty, and R.J. Linn, Storage space allocation in container terminals, Transport Res Part B: Methodological 37 (2003), 883-903
3. F.G. König, M. Lübbecke, R. Möhring, G. Schäfer and I. Spenke, “Solutions to real-world instances of PSPACE-complete stacking” in: Proceedings 15th European Symposium on Algorithms, Eilat, Israel, 2007, pp. 729-740
4. Kim, K. H., & Hong, G.-P. (2006). A heuristic rule for relocationg blocks. Computers & Operations Research, 33(4), 940–954.
5. R. De Koster, T. Le-Duc and K.J. Roodbergen, Design and control of warehouse order picking: A literature review, Eur J Oper Res 182 (2007), 481-501
6. Tang, L., Zhao, R., & Liu, J. (2012). Models and algorithms for shuffling problems in steel plants. Naval Research Logistics, 59(7), 502–524
7. Wan, Y., Liu, J., & Tsai, P.-C. (2009). The assignment of storage locations to containers for a container stack. Naval Research Logistics, 56(8), 699–713