The usual practice in using a control chart to monitor a process is to take samples of size n from the process every h hours This article considers the properties of the XBAR chart when the size of each sample depends on ...

The usual practice in using a control chart to monitor a process is to take samples of size n from the process every h hours. This article considers the properties of the X̄ chart when the size of each sample depends on ...

The usual practice in using a control chart to monitor a process is to take samples of size n from the process every h hours. This article considers the properties of the X̄ chart when the size of each sample depends on ...

Theoretical results have shown that the X̄ chart with variable sample sizes (VSS) is quicker than the traditional X̄ chart for detecting moderate shifts in the process. The idea is to make the sample size vary depending ...

In the two sample binomial case, one approach to the estimation of sample size is to conduct a pilot study and assume that the observed proportion in the pilot study have no sampling error and are in fact true population ...

Transaction costs limit the supply of credit to small and medium-sized firms (SMEs). From a sample of 65,535 SME credit proposals submitted to a large Brazilian bank between January 2004 and September 2006, this research ...