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TOOLWORX
Error & Mistake Proofing
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Error/Mistake Proofing |
Error Proofing vs. Mistake Proofing
Error proofing and mistake proofing are two different
concepts. Error proofing means to prevent an error from
occurring. Mistake proofing means to detect an error
that has occurred. ToolWorx employs both concepts in our
data collection systems.
An example of an error proofing system is ToolWorx's PLC Printer. This
printer hooks directly up to a PLC that signals the
printer which part is being made. The printer then
prints one label with the correct part number. An error
cannot be made, therefore this process is "error
proofed".
Another example of an error proofing system is the
SmartPack
Error Proofing™ End-Of-Line Error Proofing System. This
system eliminates the potential for mislabeling errors
at end of manufacturing lines before you pack or
sequence production (called In-Line Vehicle Sequencing,
or ILVS).
An example of a mistake proof system is embedded in
TWLot System™ Lot Track system. This system includes
several routines to detect errors before they get any
further. For example, in the Component Link routines,
the system validates the component material brought to
the line against the Bill of Material to ensure that it
is the right component as well as the correct
engineering level. If an error is detected, the operator
is notified by a display, an alarm, or stopping the
line, whichever is appropriate. An error can be made
(the operator can bring the wrong parts to the line),
but it is always detected by the system before the wrong
parts are used; therefore, this process is "mistake
proofed".
Another example of mistake proofing is used in TWLot™
and answers the age old question "How can I tell if
someone hasn't scanned?". The system tracks when a
component container is brought to the line. Then, a
Component Aging Report is generated daily that lists all
components that have been brought to a line but have not
been scanned to a Finished Goods or Work-In-Process
container. This way, a Supervisor can track down the
status of "old" components to ensure that they are still
waiting for use. The aging report will help supervisor
narrow down which operators/lines are missing their
scans.
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