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Is the part :
Unseen or untouched in
subsequent process steps?
Difficult to see during assembly?
Difficult to assemble?
Difficult to see after assembly?
Difficult to differentiate between pre
and post assembly?
Can anything be done to resolve this in design of product/process?
Can the part be combined with another part?
Can the part be eliminated?
What can be done to detect whether the part has been assembled?
Detection device - torque
counter, photoelectric eye over
container, limit switch at
dispenser,....
Lock out subsequent operation if part is missing.
Lock out device - limit switch,
conductivity sensor...
Implement operator instructions,
visual aids and training as minimum
requirement
YES
NO
NO
Implement Error Proofing
(process/design change and/or
detect/lock out device)
Verify results
YES
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