Definition: The word "specification" comes from Latin, which means "instruction, instruction book, instructions." It refers to a document detailing specific specifications or requirements for a particular product, process, system, or service. A specification typically includes details such as parts and components, materials used, performance criteria, installation instructions, user manuals, and any other necessary information required by the manufacturer, suppliers, or other parties involved in the production or use of the product. The term "specifications" is often used when discussing a product's specifications for quality control purposes, as it describes how certain properties such as size, weight, color, texture, etc., are to be measured and determined. It can also refer to a list of requirements, including those related to manufacturing processes or assembly lines. In summary, the word "specification" is used in relation to specifications for products and systems, primarily focusing on specifying specific features and parameters needed to create a desirable product or service.