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Off-line gages can be very similar to near-process gages, but
often require less durability and environmental hardening
because they may be limited to use in gage lab environments
and be subject to lower sample rates, hence fewer part cycles.

They can be a great way to get the benefits of custom gaging
without the expenses associated with more highly engineered
systems. They can often easily justify themselves by improved
R&Rs, increased throughputs and reducing operator skill
requirements. They can sometimes be the result of
adaptations to existing, off-the-shelf gages.