Demand objects of the activity-based model

In the following, the demand object types of the activity-based model type in PTV Visum are described.

Demand object	Description
Locations	A location represents a place in the network where people live in households and where activities can take place. A location can be assigned to a zone or POI.
Activity locations	An activity location clearly a location to an activity and indicates that the chosen activity can be carried out at that location.
Activity executions	An activity execution is the performance of an activity and typically takes place between two trips. It is linked to several other demand objects: Activity location Person Schedule From- and To-trip An activity execution can have a duration and a start and end time.
Trips	A trip corresponds to a person's path between two activity executions. It has no spatial course and is not connected to an assignment path. Therefore, it does not have an exact departure and arrival time, but a planned departure and arrival time.
Schedules	Schedules represent the total mobility of a person in one day. Schedules can contain several tours. A person can have several schedules.
Persons	Persons are the central objects of an activity-based model. A person must be assigned to a household. As a rule, a person has one or more schedules, each consisting of activities, tours, and trips.
Households	Households group persons who have the same residence. The residence is an activity location whose activity is a home activity.