5测量系统培训教材.ppt

SPC-Basic Statistics SPC-Basic Statistics SPC-Basic Statistics SPC-Basic Statistics SPC-Basic Statistics SPC-Basic Statistics This chart shows operator bias. If no noticeable observations between operators were taken, look at machine or instrument bias, different sites, etc. Bias shows variation between groups. SPC-Basic Statistics This chart shows operator bias. If no noticeable observations between operators were taken, look at machine or instrument bias, different sites, etc. Bias shows variation between groups. SPC-Basic Statistics SPC-Basic Statistics Top chart - Operators have reproduced measurements between themselves. Bottom chart - Reproducibility could not be achieved between operators. There is at least one discrepancy in this inadequate measurement system - look for operators, environment, different instruments, shifts….. Reproducibility shows variation between groups. SPC-Basic Statistics Start off by introducing the Kick off speaker: Champion, VP,GM,ect. Go through SPACER Administrative: - Bathrooms telephones - Messages - Pagers on vibrate - Food and menu - Get up and stand during lecture 1st Assignment- Have the class introduce themselves, background, expectations, and name as many BB’s and the status of their projects. SPC-Basic Statistics Emphasize that many of the tools we discuss can be used for more than one purpose. As we discuss the tools, we will also look at other ways they can be used. Explain the stratification analysis using the information on the slide. The distinction column gives the difference between the is and the is not columns. It describes what you learned by examining what is and what is not true about the situation. Point out the references listed at the bottom of the slide. SPC-Basic Statistics * 重复性—设备偏差(E.V.) 　 %EV=100(EV/TV)=17.61% 　 　 E.V.= Rp*K1 系列 k1 　 = 0.2019 2 0.8862 　 　 3 0.5908 　 　 　 再现性—测评人偏差(A.V.) %A.V.=100(AV/TV)=20.% 　 A.V.= SQRT｛(Xdiff*K2)^2-(E.V.^2/nr)｝ 　 = 0.2297 人 k