A review of capacity planning techniques within standard software packages

This paper gives a review of capacity planning techniques from which today's standard software packages for production control make their choice. The following techniques are discussed in the paper: four variants of the rough cut capacity check, capacity requirements planning with infinite and finite loading, input/output planning without and with individual work orders, and a number of sequencing techniques. An important issue throughout the paper is the concept of robustness and nervousness of planning techniques, Aspects of interaction between techniques and human planners arc given. The human planner is still an important factor in capacity planning.     

An inventory model with lot-size dependent ordering cost

The classical Harris - Wilson inventory model assumes that the ordering cost is constant and does not depend on the quantity ordered. There are, however, many practical situations where this is not true. This paper considers an inventory model where the ordering cost depends on the size of the lot and increases in steps as the lot size increases. An algorithm is developed to determine the economic order quantity and is illustrated by a numerical example.     

制造企业自营物流与采用第三方物流的模型研究

提出了制造企业和第三方物流公司的收益模型,对模型中的变量进行了解释,并分析了制造企业不愿采用第三方物流的原因,针对以上原因,提出了能充分发挥第三方物流作用的几点措施。     

扬州制造业的竞争力评价及其表现特征

作为江苏滨江临河的重要城市,制造业在扬州经济发展中具有十分重要的地位,是扬州"工业第一方略"的主要内容。扬州制造业的优势与弱势行业分别主要是劳动密集型与资本密集型行业,许多行业具有相当的竞争力,但在实际发展中却表现出优势行业发展不足、非优势行业发展较快、出现制造业重化工业化的特征,反映出扬州制造业改变竞争力格局的努力,更反映了扬州地区对发挥比较优势与创造竞争优势的艰难权衡。     

论我国制造业发展的持久性

文章从国家和省级区域两个层次考察了制造业在我国经济发展中的重要作用,对1980年以来全国及其东、中、西部典型省份的三次产业和工业历年数据进行了结构分析和增长趋势分析。分析表明:制造业的发展过去是推动我国经济增长的主要力量,也是推动我国东部省份发展的主要力量,而且仍将是推动我国及其东部省份发展的主要力量;而中西部省份不发展,主要是制造业发展不够充分造成的,表现在工业和第二产业不发达上,中西部的发展更要重视制造业发展。最后,文章给出了相关对策建议。     

基于主成分分析的制造企业信息化评价方法研究

目前,虽然国内有一些关于企业信息化方面的研究,但针对制造企业信息化还没有形成一套比较完整的通用评价指标体系和综合评价方法。为此,在建立制造企业信息化评价指标体系的基础上,以天津制造企业为例,运用主成分分析方法确定了评价指标的权重,介绍了制造企业信息化指数的计算方法,并对企业信息化指数的评价结果进行了分析。     

试论实验仪器设备的有效管理

文章分析了原有仪器设备管理体制不足,提出了新的仪器设备管理模式,实行动态管理,实现资源共享,从而提高仪器设备的利用率。     

Dynamic performance of a hybrid inventory system with a Kanban policy in remanufacturing process

In this paper we study a hybrid system with both manufacturing and remanufacturing. The inventory control strategy we use in the manufacturing loop is an automatic pipeline, inventory and order based production control system (APIOBPCS). In the remanufacturing loop we employ a Kanban policy to represent a typical pull system. The methodology adopted uses control theory and simulation. The aim of the research is to analyse the dynamic (as distinct from the static) performance of the specified hybrid system. Dynamics have implications on total costs in terms of inventory holding, capacity utilisation and customer service failures. We analyse the parameter settings to find preferred “nominal”, “fast” and “slow” values in terms of system dynamics performance criteria such as rise time, settling time and overshoot. Based on these parameter settings, we investigate the robustness of the system to changes in return yield and the manufacturing/remanufacturing lead time. Our results clearly show that the system is robust with respect to the system dynamics performance and the remanufacturing process can help to improve system dynamics performance. Thus, the perceived benefits of remanufacturing of products, both environmentally and economically, as quoted in the literature are found not to be detrimental to system dynamics performance when a Kanban policy is used to control the remanufacturing process.     

高校贵重仪器设备管理研究--关于实现高校贵重仪器设备使用效率最大化的思考

贵重仪器设备既是高等学校教学和科研的重要保证,也是高校办学能力和科研环境的重要标志。如何使高校的贵重仪器设备在有效期内发挥最大化的使用效率,是一个值得研究的重要问题。文章从贵重仪器设备的购置依据、科学管理、以及建立相应的科学监控体系等方面对贵重仪器设备的使用效率问题进行了探讨。     

浅析电子系统防雷

通过对雷电侵入电子设备的途径及危害的分析，根据有关规范和实践经验提出了具体的防范对策，分别从电源部分、信号部分及均压环接地角度阐述了电子系统相应防雷方案和技术措施．