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(Here's) a statement to the forum issue with the exchanged appliques on the 5001 dial.It’s no discussion that such a fault should not occur.The inspection of a dial has several steps:1.At the suppliera.Appliques are placed on the dial with small feet set into drilled holesb.Final inspection of the suppliers quality controlc.Controle a la source by IWC inspection personnel at the supplier2.At IWCa.Dials are placed on the movement by final assemblyb.Watches are finally inspected by IWC QM TeamSo we have at least 5 inspection steps during the production after setting of the dials.The idea of one of the forum members that we are concentrating on the small issues and oversee the big ones is absolutely valid.What does IWC do to avoid such cases?1.We have instructed our personnel and placed the photo with the wrong appliques on the board of instructions in the inspection department.2.I have personally presented the photo in the monthly department manager routine with 35 participants of all technical departments of IWC.3.We have started since a long time a discussion with our suppliers to make a Poka Yoke solution which doesn’t allow to exchange the appliques by defining different hole distances for the small feet of the appliques. This last idea is not so easy to realize because it is expensive.A defect like this can not be avoided to 100% as long as human inspectors are involved. It is a fact that visual inspections have an error rate of about 2%. When you have 3 inspections in a sequence you will have 0.02^3 = 0.000008. So about one of about 10000 might have this defect.We are very thankful for the feedback of our forum member and would like to give to him a small gift. Could you please send to me the coordinates of him to me.
Last edited: 2015-02-25T17:29:14
Last edited: 2016-07-01T00:36:19
watch the time...
Last edited: 2014-05-18T19:41:51
Last edited: 2016-05-08T20:00:23
Simius Wrote:Is it possible to clarify the meaning of 'supplier' here?does it mean an external supplier that provides to IWC the dial with the applied numerals ready to be assembled in the case?
Last edited: 2016-09-29T01:56:27
Dick L.whichwatch at roadrunner dot com
Last edited: 2016-09-29T23:25:51
Last edited: 2013-11-18T19:07:37
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