考虑随机性与模糊性的应急服务供应链转运策略

考虑由多个应急服务集成商和两个应急服务供应商组成的二级应急服务供应链系统,基于M/M/C/∞/m/FCFS的排队网络系统研究应急服务供应链的协同转运服务策略问题。为了保障顾客满足率,应急服务集成商之间可实施就近部分协同转运服务策略,即当应急服务集成商产品的库存量大于其协同转运服务点时,可以向其产品库存水平为零的应急服务集成商提供产品协同转运服务。建立应急服务集成商总利润最大和顾客等待时间最小的双目标函数,结合随机模糊变量模拟和粒子群算法对模型进行求解。通过具体算例对比分析部分协同转运服务策略和不协同转运服务策略的优劣,并进一步分析相关参数对应急服务集成商协同转运服务策略各项指标的影响,验证模型与算法的可行性和有效性。

Collaborative transshipment strategy of service supply chain for emergencies based on stochastic and fuzzy simulation

Including two service supplies and multiple service integers based on the M/M/C/∞/m/FCFS queuing system, a two-echelon service supply chain system was considered. The lateral collaborative transshipment principle and partial inventory sharing strategy to satisfy the demand. When a service integers stock is more than the collaborative transshipment point, the service integer could transport service item to other service integers. Otherwise, other service integers or the shared warehouse should transport service item to this service integer. Then the model is developed with the constraint of individual service integers service level to maximize the system total profit and minimize the waiting time, in which service integers stock level and collaborative transshipment points are decision variables. Based on two-stage particle swarm algorithm which combined random fuzzy simulation, the proposed model is solved. At last, a numerical example is given to analyze the total profit difference and the waiting time among partial collaborative transshipment strategy and no collaborative transshipment strategy. It is shown that the strategy with collaborative partial transshipment is superior to that without collaborative transshipment and it proves that this study has theoretical and practical values.