A prioritized list of criteria that the project’s product
must meet before the customer will accept it - i.e. measurable definitions of the attributes that must apply to the set of products to be acceptable to key stakeholders (and, in
particular, the users and the operational and maintenance organizations). Examples are: ease of use, ease of support, ease of maintenance, appearance, major functions, development costs, running costs, capacity, availability, reliability, security, accuracy or performance

PRINCE2 (TM) Project Product Description