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:
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. |