倉(cāng)儲(chǔ)系統(tǒng)控制技術(shù)中英文資料外文翻譯文獻(xiàn)(參考版)
2024-12-10 10:43本頁(yè)面
【正文】 s to the orderpicker. Carousels may rotate horizontally (horizontal carousel) or vertically (vertical carousel).Pickerless systems make use of robottechnology or automatic respect to product retrieval we distinguish unitload retrieval systems and orderpicking systems. In a unitload retrieval system plete unitloads are retrieved. Accordingly, the vehicles either perform one stop (storage or retrieval) or two stops (storage followed by a retrieval)in a single trip. We refer to these trips as a single mand cycle and a dualmand cycle, respectively. In an orderpicking system typically lessthanunitload quantities are picked, so that there will be multiple stops per trip (multimand cycle). . Warehouse management We may establish high quality solutions for warehouse management by deposing the task into a number of hierarchical subproblems. A wellde?ned hierarchy will prevent local optimization without considering the global context. A broad hierarchy of management decisions is the following ([5]): ? Strategic decisions. ? Tactical decisions. ? Operational decisions. Strategic management decisions are longterm decisions and concern the determination of broad policies and plans for using the resources of a pany to best support its longterm petitive strategy. Tactical management decisions primarily address how to e?ciently schedule material and labor within the constraints of previously made strategic decisions. Operational management decisions are narrow and shortterm by parison and act under the operating constraints set out by the strategic and tactical management central themes of this survey are planning and control of warehousing systems. Planning of warehousing systems refers to the policies which are developed at the tactical level concerning the assignment of goods to storage locations. Control problems concern the actual sequencing, scheduling and routing of the movement of goods. Planning and control decisions are subject to strategic management and inventory management. Strategic management de?nes longterm goals and it constitutes the supply chain anization and the warehouse design (for a review of warehouse design models we refer to Ashayeri and Gelders [6]). Inventory management decides which products are kept in storage in what quantities and when shipments arrive. Intelligent inventory management may reduce the inventory levels and thereby improve the e?ciency of the warehouse operation. For a review of inventory models that consider the total inventory quantity we refer to Hariga and Jackson [7]. Since these models both involve the inventory and the warehouse operation, the models establish a bridge between the ?eld of warehousing and the field of inventory strategic decisions a long period, these decisions face high uncertainties. Typical methods used for solving such problems are stochastic models and simulation, based on demand estimates. Planning problems concern the intermediate period and consider an existing situation. Planning algorithms are based on historical data and attempt to ?nd solutions with a high quality av
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