Shipbuilding production management and logistics control are studied so as to find an advanced shipbuilding production logistics management style.The necessity and feasibility to integrate MRP-Ⅱ(manufacture resource ...Shipbuilding production management and logistics control are studied so as to find an advanced shipbuilding production logistics management style.The necessity and feasibility to integrate MRP-Ⅱ(manufacture resource planning)and JIT(just-in-time)are researched properly following the comparison of MRP-Ⅱ and JIT and the analysis of shipbuilding production characteristics.A shipbuilding logistics system combining MRP-Ⅱ with JIT is set up and discussed according to a master production schedule(MPS),MRP and workshop-floor production control.The system is able to simplify the shipbuilding production plan,balance the workshop production,stabilize the supply,and inspire positivity and creativity so as to raise the shipbuilding production management level.展开更多
A seamless multimodal transit system has been a goal for transportation planners and users. Owing to the developments of advanced public transportation and telecom technologies such as automatic vehicle location (AVL)...A seamless multimodal transit system has been a goal for transportation planners and users. Owing to the developments of advanced public transportation and telecom technologies such as automatic vehicle location (AVL) and real-time passenger information system, key just-in-time (JIT) concepts can now be realized in process design and coordinated scheduling to shape a seamless multimodal transit system. JIT refers to a production system that times both movements of goods during production and delivery from suppliers together. It meets the same logic for seamless multimodal services. Therefore, this study innovatively analyzes possible public transportation technologies for JIT uses;moreover, to layout the possible application frame-work of a transportation technology based JIT multimodal transit system for main station area in Taipei city. With this innovative framework, multimodal transit services can deliver to the right place at right time.展开更多
An integrated production planning and control model based on MRPⅡand JIT is put forward through analyzing the characteristics of magnetic materials manufacturing companies. Master Production Schedule with limited cap...An integrated production planning and control model based on MRPⅡand JIT is put forward through analyzing the characteristics of magnetic materials manufacturing companies. Master Production Schedule with limited capacity and operational plan in workshop level based on the basic data of flow chart are formulated by this model which applied JIT idea and based on customer order demand. Push production is adapted during execution phase combined with process flow cards. The model is helpful to reduce inventory,keep certain flexbility of production and improve continuity and equilibrium of manufacturing process.展开更多
JIT(just in time)是一种按需供给的生产方式,也是一种视一切库存为浪费的生产方式,它遵循的是供需协调原则。在这种生产方式下,供方必须根据需方需要的产品品种、数量、交货时间和地点来组织生产,因而没有了生产的独立性和灵活性。为...JIT(just in time)是一种按需供给的生产方式,也是一种视一切库存为浪费的生产方式,它遵循的是供需协调原则。在这种生产方式下,供方必须根据需方需要的产品品种、数量、交货时间和地点来组织生产,因而没有了生产的独立性和灵活性。为了提高供方的独立性和灵活性,许多学者提出了一种基于JIT方式下,单一供方和单一需方如何保持协作来减少总成本的库存模型,本文对此库存模型作了修正,并在此基础上进一步研究了两个对总成本影响的因素:(1)生产率p与需求率d之比(在d一定的条件下);(2)生产提前期T。本文的研究结果对供需双方更好实施JIT生产方式有一定的参考作用。展开更多
基金The National Key Technology R&D Program of China during the 11th Five-Year Plan Period(No.2006BAH02A06)
文摘Shipbuilding production management and logistics control are studied so as to find an advanced shipbuilding production logistics management style.The necessity and feasibility to integrate MRP-Ⅱ(manufacture resource planning)and JIT(just-in-time)are researched properly following the comparison of MRP-Ⅱ and JIT and the analysis of shipbuilding production characteristics.A shipbuilding logistics system combining MRP-Ⅱ with JIT is set up and discussed according to a master production schedule(MPS),MRP and workshop-floor production control.The system is able to simplify the shipbuilding production plan,balance the workshop production,stabilize the supply,and inspire positivity and creativity so as to raise the shipbuilding production management level.
文摘A seamless multimodal transit system has been a goal for transportation planners and users. Owing to the developments of advanced public transportation and telecom technologies such as automatic vehicle location (AVL) and real-time passenger information system, key just-in-time (JIT) concepts can now be realized in process design and coordinated scheduling to shape a seamless multimodal transit system. JIT refers to a production system that times both movements of goods during production and delivery from suppliers together. It meets the same logic for seamless multimodal services. Therefore, this study innovatively analyzes possible public transportation technologies for JIT uses;moreover, to layout the possible application frame-work of a transportation technology based JIT multimodal transit system for main station area in Taipei city. With this innovative framework, multimodal transit services can deliver to the right place at right time.
基金supported by Ministry of Education Social Science and Humanities Fund(12YJA630187)SHANNXI Social Science Fund(10Q067)High Education Research Fund of Northwestern Polytechnical University(2014)
文摘An integrated production planning and control model based on MRPⅡand JIT is put forward through analyzing the characteristics of magnetic materials manufacturing companies. Master Production Schedule with limited capacity and operational plan in workshop level based on the basic data of flow chart are formulated by this model which applied JIT idea and based on customer order demand. Push production is adapted during execution phase combined with process flow cards. The model is helpful to reduce inventory,keep certain flexbility of production and improve continuity and equilibrium of manufacturing process.
文摘JIT(just in time)是一种按需供给的生产方式,也是一种视一切库存为浪费的生产方式,它遵循的是供需协调原则。在这种生产方式下,供方必须根据需方需要的产品品种、数量、交货时间和地点来组织生产,因而没有了生产的独立性和灵活性。为了提高供方的独立性和灵活性,许多学者提出了一种基于JIT方式下,单一供方和单一需方如何保持协作来减少总成本的库存模型,本文对此库存模型作了修正,并在此基础上进一步研究了两个对总成本影响的因素:(1)生产率p与需求率d之比(在d一定的条件下);(2)生产提前期T。本文的研究结果对供需双方更好实施JIT生产方式有一定的参考作用。
