Commercial off-the-shelf (or COTS) is a term for systems which are manufactured commercially, and then tailored for specific uses. This is most often used in military, computer and robotic systems. COTS systems are in contrast to systems that are produced entirely and uniquely for the specific application.
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There are many commercially available, "off the shelf" software systems that include computerized instructions to identify improper claims.
Commercially developed edits do help identify claims that should not be paid as submitted, and so will be an important addition to our efforts to make sure Medicare makes only appropriate payments.
Commercially developed edits should be an important addition to our efforts to protect Medicare program integrity and ensure that we make only appropriate payments.
When buying things, "Off the shelf" refers to products that have already been designed and made, compared to "made to measure" ("one-off", "custom-built", "custom made", etc.) which refers to products that have to be made to a special order.
Off the shelf products are generally cheaper and more quickly available than made to measure.
The phrase could also be used to refer to the "Off the Shelf Festival", a festival of writing and reading which takes place each year in Sheffield, United Kingdom.