01-PFMEA-最新要求.pptx

Why the focus on PFMEA? ? Investigating Field Actions (including recalls) we found three general areas of cause: ? Process not followed (at GM facility) – GM Issue ? Requirements (and in turn Failure Mode) not comprehended (system, design or process) – GM and/or Supplier Issue ? Purchased parts quality issue – Supplier Issue Supplier_PFMEA Workshop rev 051315 1 Requirement ? Add Requirement column and drive cross- function team to identify the requirement of process ? Understand how to make a good part 1 Requirement-Example Process Step/ Function Requirement Assemble seat adjuster to seat bottom using torque tool and 4 bolts Correct Bolt Correct Quantity of Bolts (4) Correct Assembly sequence – first Bolt in right front hole Bolts Fully Seated Bolts Correctly Torqued Failure Modes can be simply stated as the opposite of the requirement. (Examples on the following slides) Each process step or operation may generate one or more failure mode statements Each failure mode creates a new line in the form 4 Potential Failure Mode A failure to produce the intended process requirement Potential Failure Mode Process Step/ Function Requirement Potential Failure Mode Assemble seat adjuster to seat bottom using torque tool and 4 bolts Correct Bolts Incorrect Bolts Correct Quantity of Bolts Incorrect Quantity of Bolts Correct Assembly Sequence – first screw in right front hole Incorrect assembly Sequence Bolts Fully Seated Bolts not fully seated Bolts Correctly Torqued Bolts not correctly torqued Identify potential failure modes for each step Should be as concise as possible 5 FM= Potential Failure Mode Incorrect Bolts Incorrect Quantity of Bolts Incorrect Assembly Sequence Bolts not fully seated Bolts not correctly torqued Effect of failure and Severity ? Identify the effects of the failure internally and externally (GM and customer ) ? Each of these will receive their own severity ranking, and the highest severity value will be used in the s