minitab制程能力分析-文庫(kù)吧資料
2025-04-10 13:18本頁(yè)面
【正文】 SL to . PPU is the ratio of USL to . For machine 1, PPL = and PPU = , indicating that more than percent pf the process output is more than the upper specification limit. This also indicates that the process has median close to the lower specification limit. This is also evident in the histogram. Machine 2 show similar results. ? Ppk is the minimum of PPU and PPL. For both machines, high value of Pp and low value of Ppk indicate that the process median is off the specification midpoint. This also indicates that more than percent of the process output is outside at least one of the specification limits. 67 ? The PPM LSL () indicates that for machine 1, 1 out of 1 million is expected to fall below the lower specification limit of 27 oz. The PPM USL (10904) indicates that for machine 1, 10904 out of 1 million are expected to exceed the upper specification limit of 35 oz. Machine two show similar results. ? Industry guidelines determine whether the process is capable. A generally accepted minimum value for the indices is . For both machines the capability indices are lower than . The process tends to put more food in a package than the upper limit. The manufacturer needs to take immediate steps to improve th
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