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您的检索式：作者名="MENDIS Gamini"
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| 1 | An Approximation of the Customer Waiting Time for Online Restaurants Owning Delivery System显示文摘Online restaurants, which receive online orders and deliver food directly to the customer’s residence, are becoming increasingly popular. To be successful, online restaurants need to provide reliable and prompt deliveries. Careful design of the meal preparation and order delivery systems is needed to avoid excessive cust omer waiting time bet ween ordering and delivery. This paper considers the meal preparation and delivery processes simultaneously to approximate average customer waiting time for deliveries. The authors first discuss the system performance with one cook and unit-capacity delivery vehicles, using an M/G/1queue and a GI/G/1queue. Numerical experiments show that our approximation can adequately describe real waiting times. Then, series queues with multiple cooks and multi-capacity delivery vehicles, e.g., an M/G/n queue and a GI/Gn/1 queue, are examined. Results show that except for situations with a large meal preparation time and a small vehicle capacity, compared with the result of simulation, the approximation in this paper is acceptable with a deviation of less than 20%. The marginal decrease in waiting time associated with hiring more vehicles is est.imated under different meal preparation speeds, sizes of service area and vehicle capacities. | ZHANG Tianhua ZHAO Fu ZHANG Juliang MENDIS Gamini RU Yihong SUTHERLADN John W | 2019 | Journal of Systems Science & Complexity2019，32，3： | 2 |
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