【正文】 9 2 0 . 1 9 1 8 . 7 5 1 8 . 4 5 1 8 . 4 1 1 8 . 4 1 1 8 . 4 1 1 8 . 4 1 1 8 . 4 1 1 8 . 4 1 1 8 . 4 1 1 8 . 4 1 1 8 . 4 1 1 8 . 4 1 1 8 . 4 1 1 8 . 4 1 1 8 . 4 1 %0 . 4 2 3 . 0 1 1 5 . 1 0 1 2 . 3 3 1 1 . 6 4 1 1 . 5 2 1 1 . 5 1 1 1 . 5 1 1 1 . 5 1 1 1 . 5 1 1 1 . 5 1 1 1 . 5 1 1 1 . 5 1 1 1 . 5 1 1 1 . 5 1 1 1 . 5 1 1 1 . 5 1 1 1 . 5 1 %0 . 5 1 3 . 3 6 8 . 4 7 7 . 0 3 6 . 7 3 6 . 6 9 6 . 6 8 6 . 6 8 6 . 6 8 6 . 6 8 6 . 6 8 6 . 6 8 6 . 6 8 6 . 6 8 6 . 6 8 6 . 6 8 6 . 6 8 %0 . 6 7 . 1 9 4 . 4 1 3 . 7 3 3 . 6 1 3 . 5 9 3 . 5 9 3 . 5 9 3 . 5 9 3 . 5 9 3 . 5 9 3 . 5 9 3 . 5 9 3 . 5 9 3 . 5 9 3 . 5 9 %0 . 7 3 . 5 7 2 . 1 3 1 . 8 3 1 . 7 9 1 . 7 9 1 . 7 9 1 . 7 9 1 . 7 9 1 . 7 9 1 . 7 9 1 . 7 9 1 . 7 9 1 . 7 9 1 . 7 9 %0 . 8 1 . 6 4 0 . 9 5 0 . 8 4 0 . 8 2 0 . 8 2 0 . 8 2 0 . 8 2 0 . 8 2 0 . 8 2 0 . 8 2 0 . 8 2 0 . 8 2 0 . 8 2 %0 . 9 0 . 6 9 0 . 4 0 0 . 3 5 0 . 3 5 0 . 3 5 0 . 3 5 0 . 3 5 0 . 3 5 0 . 3 5 0 . 3 5 0 . 3 5 0 . 3 5 %1 . 0 2700 1509 1363 1350 1350 1350 1350 1350 1350 1350 1350 PPM1 . 1 967 532 485 484 483 483 483 483 483 483 PPM1 . 2 318 165 160 159 159 159 159 159 159 PPM1 . 3 3 63 38 33 33 32 32 32 32 PPM1 . 4 27 14 13 13 13 13 13 PPM1 . 5 7 3 3 3 3 3 PPM1 . 6 7 0 . 6 0 . 3 0 . 3 0 . 3 0 . 3 PPM2 . 0 0 . 0 0 . 0 0 . 0 0 . 0 PPM2 . 5 0 . 0 0 . 0 0 . 0 PPM3 . 0 0 . 0 0 . 0 PPM4 . 0 0 . 0 PPMPp=Ppk=1,33 ? 63 ppm defects = 0,006% Cp=Cpk=1,67 ? 0,6 ppm defects = 0,00006% Note: Ppm reject rates calculated from Cp Cpk are based on the short term variation which may not represent the long term reject rate 37 169。 NOKIA 2023 Estimate Cp and Cpk? D USL LSL D) Nominal Mean USL LSL 6*s USL Mean Mean LSL 3*s 44 169。 NOKIA 2023 Exercise 3: Cpk Data Spreadsheet ? Open spreadsheet Data exercice . Dim 13 is identical to the data from the previous exercises. ? Verify the results from the previous exercises for dimension 13. ? Analyse the remaining data sets an ment the process, should any actions be made? Remember to create and look at the charts. 52 169。 :15:5607:15Apr231Apr23 ? 1故人江海別，幾度隔山川。 , April 1, 2023 ? 很多事情努力了未必有結(jié)果，但是不努力卻什么改變也沒有。 2023年 4月 1日星期六 7時(shí) 15分 56秒 07:15:561 April 2023 ? 1空山新雨后，天氣晚來秋。 2023年 4月 1日星期六 上午 7時(shí) 15分 56秒 07:15: ? 1最具挑戰(zhàn)性的挑戰(zhàn)莫過于提升自我。勝人者有力，自勝者強(qiáng)。 。 2023年 4月 1日星期六 7時(shí) 15分 56秒 07:15:561 April 2023 ? 1做前，能夠環(huán)視四周；做時(shí)，你只能或者最好沿著以腳為起點(diǎn)的射線向前。 , April 1, 2023 ? 雨中黃葉樹，燈下白頭人。 NOKIA 2023 Graphical Presentation: Xbar and RChart XBar Chart RChart 50 169。 NOKIA 2023 Estimate Cp and Cpk? B) LSL USL B) Nominal Mean USL LSL 6*s USL Mean Mean LSL 3*s 42 169。 NOKIA 2023 ?Cpk the process NOT CAPABLE Acceptability of Cpk Index ?Cpk = the process is CAPABLE ?Cpk = the process has reached Six Sigma level 35 169。 NOKIA 2023 The difference between sST and sLT ?The difference between sLT and sST is only in the way that the standard deviation is calculated ?sLT is always the same or larger than sST ?If sLT equals sST, then the process control over the longer term is the same as the shortterm, and the process would not benefit from SPC ?If sLT is larger than sST, then the process has lost control over the longer term, and the process would benefit from SPC ?The reliability of sLT is improved if the data is taken over a longer period of time. Alternatively sLT can be calculated on several occasions separated by time and the results pared to see whether sLT is stable 27 169。 (m252。 NOKIA 2023 Why Make Process Capability Studies LSL (lower specification limit) 10,7 USL (upper specification limit) 10,9 Nominal 10,8?0,1 This part is within spec. The tool would be approved if only this part was measured These parts are out of spec and could be approved if only one good part was measured A process capability study would reveal that the tool should not be accepted When a dimension needs to be kept properly within spec, we must study the process capability …. but still this is no guarantee for the actual performance of the process as it is only an initial capability study 14 169。 NOKIA 2023 Two Types of Product Characteristics Variable: A characteristic measured in physical units, . millimetres, volts, amps, decibel and seconds. ON OFF Attribute: A characteristic that by parison to some standard is judged “good” or “bad”, . free from scratches (visual quality).