An activity is an element of a programme, schedule or network that describes an element of scope.

The length of time that the activity is expected to take is called Activity Duration. An element of scope in a project that consumes time and uses resources (eg. people, materials and equipment).

An activity is the smallest unit of work on a Programme, but depending upon the hierarchy or level of detail of the programme, may be divisible into smaller or more detailed activities.

Also referred to as Task. All activities are defined by a unique Activity ID.