apqp與ppap概述(英文版)(文件)
【正文】 ? Includes product and process special characteristics.? Includes SPC requirements.? Follows flow of process flow chart and PFMEA.? May require customer approval.Types of Control Plans? Prototype build control plan(s) ? Prelaunch control plan? Production control planPrototype Build Control Plan? A description of the dimensional measurements.? Material tests– Functional tests that will occur during prototype build.Prelaunch Control Plan? Description of dimensional measurements, materials, and functional tests.? Adds additional product and process controls.? Purpose is to contain potential nonconformities utilizing:– More frequent inspections and/or tests.– More inprocess and finsl inspection and/or check points.– Statistical evaluations.– Increased audits.Production Control Plan? Update prelaunch control plan.? Add:– Sampling plans– Control method– SPC, inspection, attribute data and mistake proofing.– Reaction plan? Nonconformances clearly identified, quarantined and disposition made.? Requires customer approval unless otherwise specified.Control Plan Use? Initial: To document and municate initial process control.? Next: Guidance in controlling processes and to ensure product quality.? Last A living document reflecting current methods of control and measurement systems used.Multiple Molds, Tools, Dies and Patterns? Complete dimensional layer required from one part from each cavity as a minimum.? Supplier must identify specific cavity for each part submitted.Part Submission Status? Never ship production parts before receiving customer approval.? Supplier must ensure that future production continues to meet customer requirements.? No production parts can be shipped until approval is received.Automotive Documentation DevelopmentDevelop Process Flow ListingCheck for Customer RequirementsEnter Every “Major” Process from Flow Listing into FMEA Form Give careful consideration to what you consider a “Major” processDevelop FMEA Element for Every ProcessUse the appropriate RPN numbers and considerations of other appropriate information / data to determine Critical characteristicsDevelop the Control Plan with Critical CharacteristicsDevelop control mechanisms appropriate for Critical characteristics.Give careful consideration to defining Control Plan stagesPrototype Prelaunch Production? Provides Proof of Capability? Made
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