Notes and Communications REPLANNING FREQUENCIES FOR MASTER PRODUCTION SCHEDULES

Updating production plans typically is achieved by rolling the planning horizon forward one period at a time, each time including the latest information in order to determine the best course of action to pursue in the present period. Theoretical planning-horizon studies have identified the conditions by which the production decisions in the current and some specified number of future periods remain optimal given some set of future demands. Motivated by these findings, this study addresses the replanning frequency in a hierarchical production planning problem where no planning-horizon theorems are available. In this problem the aggregate production plan and the master production schedule are linked by a rolling-horizon practice. Empirical experimentation indicates that under certain cost and demand conditions the master production schedule need not be updated every period. If a schedule does not need to be updated for several periods, the schedule for these periods can be frozen to provide stability for planning components at lower levels in the bill of material of the products. The results of this study thus provide some reference for the determination of the frozen portion of the master production schedule.     

中国经济增长的资本策略选择

本文通过对资本及资本对经济增长的作用的分析, 提出中国现阶段经济增长的资本策略选择应从宏观经济和区域经济两个层面考虑, 根据中国经济增长的具体情况来做资本策略的选择。     

购物社区价值共创行为与购买意愿 ———感知价值的中介作用∗

购物社区是商家与顾客进行价值共创的重要平台,顾客参与价值共创行为对商家具有重要作 用。 为探究价值共创行为如何影响购买意愿,基于 361 份购物网站用户的问卷调查数据,运用结构方程 模型和 Bootstrap 分析方法探讨购物过程中消费者感知价值在价值共创行为与购买意愿间的中介作用。 实证结果表明:价值共创行为,包括知识贡献行为与顾客公民行为,对购买意愿存在显著正向影响,感知 价值在知识贡献行为、顾客公民行为影响购买意愿的过程中发挥了显著的中介作用。 基于以上研究结 论,对在线零售商家提出建议。     

对我国现行政府采购制度的分析和思考

政府采购制度是财政支出管理方式的一种全新改革。我国的政府采购自 1996年在深圳首开先河以来 ,已有大部分省市进行了试点或推广。分析了我国在实行政府采购制度过程中存在的主要问题 ,提出了健全和完善政府采购制度的建议