Integrating an EMQ model and product quality

Abstract

In this paper we further extend Chen and Wang's study concerning a CSP‐1 plan applied to the economic manufacturing quantity (EMQ) model with imperfect quality. Adopting the backorder assumption for shortages, the modified total inventory cost includes the setup cost, the holding cost, the backordering cost, the inspection cost, and the internal and external failure cost. By solving the modified EMQ model, we not only obtain the required level of product quality but also determine the minimum of the total inventory cost.     

Chain Sampling Scheme under Constant Inspection Errors

The primary aim of this paper is to extend the inspection error consideration to chain sampling schemes, an area that has not been dealt with in the literature. A mathematical model is developed to investigate the performance of chain sampling schemes under constant inspection errors. Expressions of performance measures, such as operating characteristic function, average total inspection and average outgoing quality, are derived to aid the analysis of a general chain sampling scheme, ChSP‐4A ( ) r, developed by Frishman. This study reveals that as Type I inspection error increases the probability of acceptance will decrease and as Type II inspection error increases the acceptance probability will increase. The effect of Type II error on the probability of acceptance is very marginal compared with that of Type I error, especially when the true fraction non‐conforming is small. In addition, the effects of inspection errors can be ‘eliminated’ by transforming to its equivalent perfect inspection counterpart, hence greatly reducing the complexity of the analysis. The effects of other sampling parameters are also studied to serve as a foundation for future plan designing purposes. Copyright © 2006 John Wiley & Sons, Ltd.     

温控高纯KTP内腔倍频Nd:YAG激光器

将高纯KTP晶体置于一温控炉内,利用温度调谐,在一声光调Q,直腔式Nd:YAG激光器中获得了高功率、高效率倍频绿光输出.最高倍频绿光输出功率超过38 W,倍频光输出功率的转换效率大于0.91%,不稳定度为±2.3%.高纯KTP与一般KTP相比,倍频效率提高了18.8%.     

根据新版GB2828.1-2003抽样检验程序对成品进行质量控制

本文介绍了2003年发布的新版GB/T2828.1-2003<计数抽样检验程序第1部分:按接受质量限(AQL)检索的逐批检验抽样计划>的特点,重点介绍其优化我司成品抽样检验中的作用.     

Economic Design of CSP-1 Plan Under the Dependent Production Process and Linear Inspection Cost

Chen and Chou presented the economic design of type I continuous sampling plan (CSP-1 plan) under the linear inspection cost. However, it can be argued that the production process is seldom independent. In this paper, we further propose the problem concerning the economic design of CSP-1 plan under the dependent production process and linear inspection cost. A solution procedure is developed to find the unique combination (i*, f*) that will meet the average outgoing quality limit (AOQL) requirement while also minimizing the total expected cost per unit produced during one inspection cycle.     

温控高纯KTP内腔倍频Nd∶YAG激光器

将高纯KTP晶体置于一温控炉内 ,利用温度调谐 ,在一声光调Q ,直腔式Nd∶YAG激光器中获得了高功率、高效率倍频绿光输出。最高倍频绿光输出功率超过 38W ,倍频光输出功率的转换效率大于 0 91% ,不稳定度为± 2 3 %。高纯KTP与一般KTP相比 ,倍频效率提高了 18 8%。