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In grocery retail supply chains, a single retailer with a large market share is delivered by many suppliers. For replenishment decisions the retailer (or the supplier in case of Vendor Managed Inventory) has to make a tradeoff between keeping more inventory or using a higher replenishment frequency. In models studying this tradeoff inventory and transportation capacities are often fixed and costs...
Regional food hubs aggregate, distribute, and market local food, with a goal of promoting environmental and social sustainability. They provide an alternative distribution channel through which small-scale producers can access wholesale markets. However, food hubs face many barriers to growth and success. In particular, they are often unable to achieve the logistical and operational efficiencies that...
In this paper we propose a new approach to design and control an ambulatory surgery unit through formal modelling and discrete-event simulation. Taking into account the demand increase for ambulatory care in the hospital, we propose a comprehensive methodology to adjust the required resources (beds and stretchers) to optimize patient pathway through the ambulatory surgery unit. Several performance...
Crowd simulation is a well-studied topic, yet it usually focuses on visualization. In this paper, we study a special class of crowd simulation, where individual agents have diverse backgrounds, ad hoc objectives, and non-repeating visits. Such crowd simulation is particularly useful when modeling human agents movement in leisure settings such as visiting museums or theme parks. In these settings,...
Transportation engineering is one of the most popular area of Operations Research in which fractional programming is used. In this study, we present two algorithms to find initial basic feasible solution of a linear fractional transportation problem. Also we present a methodology to find optimal solution of the stated problem. Using simulation experiments on large number of examples we compare the...
Wearable technologies are becoming the main interface between human and surrounding environment for a variety of context-aware and autonomous applications. Ubiquitous, small-size, and low-cost smartphones carried by everyone nowadays are equipped with a host of embedded sensors that provide groundbreaking opportunities to collect and use multimodal data in data-driven decision support systems. Simulation...
Usually simulation studies of automated material handling systems of semiconductor fabs are extremely time consuming. This is due to the high detail of models used for investigations which are partly provided by transportation system suppliers. These models only provide poor possibilities for adjustment and are computationally expensive. The article will address these issues by proposing an adjustable...
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