RFC-反应流程图.ppt

6/25/97 PCS Elements Contents Introduction What is an RFC? Benefits of Using an RFC When Should an RFC be Used? Developing an RFC Documentation of RFC Results RFC Storage and Retention RFC Continuous Improvement Guidelines RFC Expectations What is an RFC? A document to contain suspect product and return the process/equipment to a productive state as quickly as possible. Composed of defined set of tasks (action items) to be performed in specific order Requires certain decisions to be made to find solution to the problem and therefore may lead to two or more different solutions depending on the scenario. RFC Structure ”Diagnosis activities are used first to determine the cause of the process instability. For each possible cause, there is a set of remedy activities that are used to fix the problem once the cause has been determined. ”Verification activity is the final step. It is performed to make sure that the process problem has been fixed. Example of an RFC (Flowchart Type) Benefits of Using an RFC Identifies cause of process or equipment failures Control charts and SPC trend rules tell us only when the process is out-of-control, not why it is out-of-control. They cannot tell us what to do to fix the problem, either. For that, we need the RFC. Leads Mfg Technician/Specialist through steps in solving the problem in the quickest possible time Minimal need for Engineering involvement Documents problem cause and resolution history When Should an RFC be Created? Statistical process control When an out-of-control (OOC) condition occurred Product quality and yield control When questionable products are detected at any station When low yielding lots are seen at any station Process/Equipment failure For restoring a machine to production after it has been shut down due to a process/equipment related failure RFC Model Who Develops the RFC? Initiated and led by the process or equipment owner (e.g., Module Engineer) in a team environment RFC Development Team should include t