CONTROL CHARTS APPLYING A SEQUENTIAL TEST AT FIXED SAMPLING INTERVALS 9 T Vs-PsI P-VIV VsT include combined VSS-VSI control charts.The sam pling interval of the FSI control charts was chosen (unit time). For chart prov ad pdlictabiem of the onsit】 and the reference value 0.15 This choice for dceoinalfor a variable sampling rate chart can be used to reduce maintaining =0,all VS. d times is used to red all control charts in Tables 2 and 3 were set up to sampling out reducing the red t when =0,while all can also be used in this way to reduce sampling costs while maintaining a required detec ability.Thus 3 when 6 0.and all of to long the SPRT SSATS at various values of.Table 6 gives the sam was up to have sever A an ASN =5 when 6 narts wer SSATS as the SPRT chart.In Table 6.all charts wer n oll of the matched to have ATS are matched to have the same FAR and the same in when and cuSuM chart was inerea d until its ssats an which chart proxim SPRT the smal chart aud the FSS-ESI AOR =n when 6 =0.Hence,as seen in Table 6.the equlres CUSUM charts in Table 2 are r aid the rea an SPRT chart can provide the SPRT arequired detection ability with substantially lowe sampling effort compared to the other control charts Guidelines for the Design cha s are of SPRT Charts g intervals. The Guidelines for the design of an SPRT chart ar SS's and/o paring the charts using Tables 2-5,it is clear that suggested for chart design in the qualityco the SPRT chart is substantially more efficient than trol literature (for examples,see the design proce Vol.29.No.1.January 1997 Journal of Quality Technology Reproduced with permission of the copyright owner.Further reproduction prohibited without permission.Reproduced with permission of the copyright owner. Further reproduction prohibited without permission