A SIMULATION ANALYSIS OF THE JAPANESE JUST-IN-TIME TECHNIQUE (WITH KANBANS) FOR A MULTILINE,MULTISTAGE PRODUCTION SYSTEM

The Japanese “just-in-time with kanban” technique reduces in-process inventory to absolute minimal levels, in concert with the Japanese belief that inventory is an unnecessary evil. Due to the success of Japanese firms that employ this type of system, American firms would like to import this technique and emulate Japanese successes. But this Japanese success may be attributable not only to the just-in-time with kanban technique but also to the production environment in which the technique is employed. This paper simulates the just-in-time with kanban technique for a multiline, multistage production system in order to determine its adaptability to an American production environment that might include such characteristics as variable processing times, variable master production scheduling, and imbalances between production stages. The results have practical implications for those firms considering adoption of the Japanese technique.     

SOME COMMENTS ON “A SYSTEMS PERSPECTIVE ON MATERIALS REQUIREMENTS PLANNING”*

We believe there are some serious deficiencies in the Morecroft article on MRP problems which appeared in a recent issue of this journal. The article, at the most, shows that MRP, inappropriately imposed on an existing production system, can result in undesirable system performance. This does not represent a new or startling conclusion. Four problem areas in the article are discussed, and suggested alternative approaches are offered.     

THE HARMS SHOE COMPANY: DEVELOPMENT OF A COMPUTER MODEL FOR THE CLASSROOM

This paper describes a case that examines five key topics in production and operations management [1]—forecasting, inventory control, transportation planning, aggregate planning, and the disaggregation of the aggregate plan—in an integrated, realistic manner for upper-level undergraduate business majors [3]. The case structure stresses the linkage of these interrelated subjects and supplements the regular classroom presentations dealing with them. The case relies on computer calculations at each stage to provide the information input for calculations at the next stage. It is a static model with a twelve-month planning horizon. Students complete several exercises and assume several roles as the case unfolds. They act on their own in filling some roles and as members of teams in performing others. They do not compete with each other, as the purpose of the case is to help them develop an appreciation of the factors that persons performing the role must consider.     

我国《科学学与科学技术管理》和《科学学研究》1999-2003文章内部结构和资助状况浅析

应用统计学软件SPSS,对《科学学与科学技术管理》和《科学学研究》1999—2003年刊发的825篇研究性论文的发表年、文章内部结构及资助者进行文献统计分析,以深入透析我国科技管理研究所处的阶段、研究方向和研究内容,找出其研究的特点与不足。目前科学学研究性论文研究内容有三个倾向即“集中化倾向”、“理论化倾向”和“国家政策倾向”;研究阶段多处于“问题描述阶段”;研究方法以“非经验研究”为主;基金资助比例失调。     

节能服务法律制度研究

节能不是义务,而是一种商品,一个产业,节能服务更是一种产业。节能的时代要求催生了数千亿元的节能服务市场,但是节能服务法律制度的不完善严重制约着节能服务市场的发展,本文希望通过对节能服务法律制度的研究,提出一些对我国节能服务市场发展的可行性建议。     

立足服务 改革基层人口计划管理机制

基层人口计划是各级人口计划的基础 ,也是落实人口计划时的执行计划 ,它直接影响到家家户户。现行基层人口计划的管理措施中 ,有些地方亟待完善。改革现行基层人口计划管理机制 ,让群众自愿选择生育时间已成为计划生育工作发展的必然要求     

试论我国行政事业单位人力资源管理的现状及对策

行政事业单位的管理水平对整个国民经济的发展有着重要的作用。目前我国人力资源管理还存在种种缺陷,为改变现状,从宏观上应改革现有的行政事业单位管理体制;从微观上对基层工作人员引入竞争机制,对中上层干部,实行终身雇佣制,同时应建立公平的干部选拔机制和合理的分配体制。     

对两权分离改革范式的十大实证性批判

两权分离改革范式的根本错误 ,不仅在于理论上缺乏行为分析性 ,更在于在实践中所引发的众多难题 :颠倒了自然人产权奠定法人产权的历史关系 ;没有解决国企所有者缺位的核心问题 ;延误了我国非国有企业的制度建设与全面成长的历史机遇 ;违背了世界经济发展的历史事实和基本趋势 ;没有彻底触动政治体制 ;没有解决不合理的社会关系 ;增大了我国制度变迁与经济发展的交易费用 ,没有解决国企企业家成长的制度问题 ;导致经济发展中短期化行为放大 ;社会资产缺乏理性投向。两权分离改革范式导致中国至今的经济改革走样 ,给经济发展带来现实与潜在的巨大危机与困难