commercial off-the-shelf (COTS)

Commercial off-the-shelf (COTS) refers to a standard product that is available for purchase through normal commercial channels and is not designed or built specifically for one customer’s unique requirements.

In manufacturing and industrial systems, COTS can describe purchased components, equipment, software, firmware, or tools that are used as supplied or with limited configuration. Examples include a catalog fastener, a standard sensor, or a commercially available software package used in production support.

COTS should not be confused with custom, made-to-print, engineered-to-order, or customer-furnished items. A COTS item may still require receiving inspection, supplier documentation, configuration control, or traceability depending on the product, customer requirements, and internal quality procedures. The term describes the commercial nature of the item; it does not by itself determine inspection, qualification, validation, or compliance obligations.

In aerospace and other regulated manufacturing contexts, COTS is often relevant when determining how a purchased item is controlled in procurement, quality records, first article inspection planning, and product traceability.