Amkor 8D format -updated

© 2008 Amkor Technology China, Inc. Amkor Confidential / Proprietary Business Information
8
D4 Root Cause Analysis – 3 Level Analysis
Problem : Describe problem simply Why 1 Give answer for the question ‘why the problem above happened?’. It identifies the cause of the problem above. Why 2 Give again answer the question to the same question ‘why the answers in left happened?’ Why 3 Give again answer the question to the same question ‘why the answers in left happened?’ Contribution% Sum should be 100% Therefore (Root Cause) Repeat until you cannot answer the ‘why’ anymore, which will be the root cause of the problem in process level More than one column can be used if there’re multicauses per level Repeat until you cannot answer the ‘why’ anymore, which will be the root cause of the problem in detection level %
Corrective Action Report
Customer, P/D/L, Device (If needed), Defect Name
Date (Month/Date/YYYY) Supplier Name
Enabling a Microelectronic World®
D0
General Information
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4
D4
Root Cause Analysis Failure Analysis
Failure Analysis is optional depending on the problem. However, if defective sample is available and returned to Amkor, failure analysis report must be included in this report including following as minimum - Sample information - FA Inspection/Test items and result - Conclusion
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3
D3
Nbr 1
Containment Action
Containment Action
Start & Due date : 2 Start & Due date : 3 Start & Due date :
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Amkor Confidential / Proprietary Business Information
7
D4
Root Cause Analysis Fishbone Diagram
Fishbone diagram is optional depending on failure and situation to explain of thinking process to identify root cause
© 2008 Amkor Technology China, Inc.
Amkor Confidential / Proprietary Business Information
6
D4
Root Cause Analysis Simulation to verify root cause
Simulation to verify root cause is optional depending on availability. But, it is highly recommended to go through the simulation to validate if the problem is reproducible under the estimated/identified root cause condition.
Amkor plant where a problem occurs Assigned CAR number in Amkor site Amkor SID number for the affected mat’l Amkor Lot number of the affected mat’l Problematic mat’l description Invoice quantity MRB Disposition for the affected mat’l RMA# on the returned mat’l Date when SCAR was issued to supplier Date when sample is received Supplier Supplier Sales/QA Eng’r Supplier Lot# MFG Date code (YY/WW) Defect Name Reject /Inspected Q’ty (%) Q’ty to be Returned Problem Detected area Sample Q’ty Response date of SCAR Amkor’s supplier name Name of Sales & QA Eng’r assigned Sub-lot# used in supplier factory Manufacturing date code Specific defect name in Amkor PO spec Reject q’ty & ratio as informed by Amkor Affected Lot q’ty to be returned by Amkor Where the problem was detected # of sample returned Response date of 4D / 8D to Amkor
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Amkor Confidential / Proprietary Business Information
5
D4
Root Cause Analysis Commonality Analysis
Commonality Analysis is optional depending on availability.
Responsibility :
Status/Result :
Responsibility :
Status/Result :
Responsibility :
Status/Result :
பைடு நூலகம்
• Existing lots (WIP) at Finish Goods that are potential affected should be recalled/pulled out, checked and verified. Lots affected by the problem (based on Amkor feedback) should be identified for proper disposition. • Existing lots (WIP) at the station and after the station where the problem might have happened should be identified, recalled/pulled out, checked and verified for possibility of having the defects as feedback by Amkor (this is a Product OCAP implementation). • If necessary, the checkpoints at in-process monitors and/or gates should be tightened adequately to capture the defect/problem in preventing defectives from reaching the customers. Note: - Results of the lot checking/verification must be included in this portion. - Supplier containment actions must be in effect until permanent actions are put in place. - Supplier must support and pay the sorting or any activity done on their discrepant materials since they are liable and responsible for that containment action performed by Amkor due to supportability issue.
Affected Amkor Plant Amkor SCAR# Amkor SID# Amkor Lot# SID Description Invoice Q’ty Amkor MRB Disposition RMA# SCAR Issue date Sample Receipt date
D1
Team Approach
Name Position
Job title Job title
Team Leader Team Members
Name of PS (Problem solving) team leader List up of name of PS team member In general, process engineer and QRE should be Involved as minimum
© 2008 Amkor Technology China, Inc.
Amkor Confidential / Proprietary Business Information
2
D2
Problem Description
Free Field : Describe Problem in detail based on the information received from customer considering 5W’s (Who, What, Where, When, why) and 2H’s (How many, How
much). Question Who...is complaining What...Happened/is the problem Where...did it happen? When...did it happen? >> When was it seen first? >> Has the problem occurred before? >> Has the problem occurred since? Why did it happen?(optional) How...did it happen?(optional) How big…is the problem? >>Number of rejects affected >>Number of problem >>Size of problem Answer