human: Given a node-centered hypergraph: <hypergraph>, where nodes represent authors and hyperedges represent groups of authors who co-authored the same paper.

Details of the hypergraph:
Center node: "Part dispatch in random yield multistage flexible test systems for printed circuit boards"
  Abstract: This paper concerns dynamic part dispatch decisions in electronic test systems with random yield. A discrete time, multiproduct, miltistage production system is used as a model for the test system with the objective to minimize the sum of inventory holding, backlogging, and overtime costs over a finite horizon. Exact results for such systems have been limited to either single-stage, multiple time period, or multistage, single time period problems with a single product. Here we develop two approximate policies: the linear decision rule, and the myopic resource allocation. The effectiveness of the two policies is evaluated through simulation under different operating conditions representative of those encountered in IBM and Tandem Computer facilities. The extensive computational study clearly demonstrates the overall superiority of the linear decision rule.

Connected through hyperedge HE-1 (induced by source paper "Lot Sizing with Random Yields: A Review"):
  with members:
    (none)

Question: Please tell me which research area the center author belongs to. The 4 classes are: Computer science, Mathematics, Engineering, Economics, Psychology, Business. Directly output the class name.

gpt: Mathematics