首页   按字顺浏览 期刊浏览 卷期浏览 SPCQCharts for Start-Up Processes and Short or Long Runs
SPCQCharts for Start-Up Processes and Short or Long Runs

 

作者: QuesenberryCharles P.,  

 

期刊: Journal of Quality Technology  (Taylor Available online 1991)
卷期: Volume 23, issue 3  

页码: 213-224

 

ISSN:0022-4065

 

年代: 1991

 

DOI:10.1080/00224065.1991.11979327

 

出版商: Taylor&Francis

 

关键词: Control Charts;Job Shops;Short Runs;Start-Up Processes;Unknown Parameters

 

数据来源: Taylor

 

摘要:

Classical control charts are designed for processes where data to estimate the process parameters and compute the control limits are available before a production run. For many processes, especially in a job-shop setting, production runs are not necessarily long and charting techniques are required that do not depend upon knowing the process parameters in advance of the run. It is desirable to begin charting at or very near the beginning of the run in these cases. We present here the needed formulas so that charts for both the process mean and variance can be maintained from the start of production, whether or not prior information for estimating the parameters is available. These Q charts are all plotted in a standardized normal scale, and therefore permit the plotting of different statistics on the same chart. This will sometimes permit savings in the chart management program.

 

点击下载:  PDF (976KB)



返 回