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防错措施(重点方法)
* * * * * This is a list of devices that can be used to respond to Red Flag conditions and prevent defects and/or errors which cause defects from going to the next operation. An understanding of these is essential for you to complete the charts you have been working on. The last three items listed are related to redesign issues. This may require a redesign of the product assembly or of the machinery in order to achieve your goals The following pages will illustrate some of the items listed on this slide. * * * A limit switch or microswitch is an electrical device or instrument that, with a light contact on its antenna section, can confirm the presence, position, dimension, breakage or degree of use (wear) of a part, tool, or fixture. They are also called proximity switches, photoelectric switches, and touch switches. Example: Two limit switches were mounted on the drill press. Faulty drilling is indicated if limit switch 1 is released before limit switch 2 has been tripped. A buzzer is sounded to alert the operator. Quick Exercise: Identify any existing defect made or found in your workplace where this Error-proofing device might apply. * * * * * * * * * * * * * * Step 1: Identify and describe the defect. It is helpful to show the defect rate over time. Refer back to page 3.10 of this manual to the worksheet you completed earlier. This provides some of the defect information you need. Team members should also be identified to establish accountability. Step 2: Determine where the defect is made / discovered. This is important information for later steps. Step 3: Detail the current standard procedure. Document each element / step in the operation where the defect occurred. Improvement is based upon this careful identification. Specify that the steps identified here are only those which probably contain the source of the error. Step 4: Identify deviations from standards. All errors and/or deviations from standard procedures point to where improvement
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