We formulate a bi-objective covering tour model with stochastic demand where the two objectives are given by (i) cost (opening cost for distribution centers plus routing cost for a fleet of vehicles) and (ii) expected uncovered demand. In the model, it is assumed that depending on the distance, a certain percentage of clients go from their homes to the nearest distribution center. An application in humanitarian logistics is envisaged. For the computational solution of the resulting bi-objective two-stage stochastic program with recourse, a branch-and-cut technique, applied to a sample-average version of the problem obtained from a fixed random sample of demand vectors, is used within an epsilon-constraint algorithm. Computational results on real-world data for rural communities in Senegal show the viability of the approach.
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机译:Smart Tours Lead Generator系统Smart Tours Lead Generator系统可为房地产行业,新房屋建造者和度假租赁视频之旅提供物业视频之旅:1.通过文字或文字广告,印刷广告,招牌,小册子和窗口卡进行播放消息或短信请求,然后可以在智能手机上播放视频导览2。播放时,系统还会生成ACTUAL SALES LEADS!