Product information is an overall term for any attribute used to describe a product and its capabilities. It is the most general term used for discussing the property of a product. A feature is an attribute of product offered as a special attraction. Features describe, or enhance, the usefulness of the product to the customer. If a feature with a measurable parameter is of interest to the customer, a product specification describes its performance.
Specifications formally describe product performance.
A specification is a numerical value, or range of values, that bounds the performance of a product parameter. The product warranty covers the performance of parameters described by specifications. Products meet all specifications when shipped from the factory, or from an Agilent Customer Service Center following calibration. Environmental specifications bound the external conditions applied to a product for which the specifications are valid. Some specifications are only valid over a limited, or restricted, set of external conditions but in such cases the specification includes a description of these limited conditions.