การวางแผนระบบการเคลื่อนย้ายผู้ป่วยภายในโรงพยาบาลด้วยตัวแบบการตัดสินใจแบบสองระดับ

Abstract

This research proposed a mathematical model for planning the intrahospital patient transfer system using bi-level decision making. The first level is to locate patient transfer service stations from the set of possible locations. The objective of this level is to minimize the number of stations and the sum of patient access time when patients must receive the service within the time restriction. The solution from the first level provides the locations of the service stations. Then this solution is applied during the second level for allocating necessary resources, i.e., staffs, wheelchairs, stretchers, and portable oxygen tanks, while the objective of the second level is to minimize the total cost. In addition, the busy fractions and the chance constraints method were applied to maintain the confidence level in the second level formulation. The proposed model was evaluated by solving numerical examples with different sizes. Then results from the proposed model were compared with the results solving by the goal programming technique. The results of the test problems presented that the proposed model could provide the appropriate solutions for all test problems including the small, medium, and large sizes as 10, 30, and 50 demand-nodes, respectively. While applying the goal programming technique, only the small-size problem can be solved and delivered the solution.