A prioritized list of criteria that the project product must meet before the customer will accept it, i.e. measurable definitions of the attributes required for the set of products to be acceptable to key stakeholders.
A process, function or task that occurs over time, has recognizable results and is managed. It is usually defined as part of a process or plan.
The person or group (e.g. a Project Board) who is identified as qualified and authorized to approve a (management or specialist) product as being complete and fit for purpose.
A statement that is taken as being true for the purposes of planning, but which could change later. An assumption is made where some facts are not yet known or decided, and is usually reserved for matters of such significance that, if they change or turn out not to be true, there will need to be considerable replanning.