High Level Function 4.4 Control PT Fleet
 Diagram   Definition   
DFD 4.4 Control PT Fleet

DFD 4.4 Control PT Fleet

This is a DFD diagram which provides a description of the function in the ITS environment

Overview

This High-level Function shall directly control in real-time the progressing and operation of Public Transport vehicles to guarantee the service reliability and schedule adherence.  Functionality for the management of reserve vehicles and the possibility of requiring priority for vehicles shall be features included.  The Function shall consist of the following lower level functions:

Diagrams

The Diagram(s) is(are) the Diagram(s) where you can find the function
  • The first diagram, if exists, is a DFD diagram which provides the context of the function
  • The second Diagram, if exists, is a Functional Tree which provides a hierarchical description of the function into subfunctions
  • DFD 4 Manage Public Transport Operations
  • Functional Tree of Area 4
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    Parent

    Component lower level functions

    The Functions use information from the Stores of current (real-time) and historic vehicle data, plus schedule details to produce their commands and priority requests. These Stores are provided with data by Functions responsible for monitoring the Public Transport vehicles and preparing schedules - see previous sections 6.5.3 and 6.5.4 respectively.

    Between each of these Functions there are some Data Flows. A minority of these enable the Functions to exchange data with each other. However the vast majority enable the Functions to exchange data with other parts of the Manage Public Transport Operations Area, with other Areas and with the terminators. The Functions and Data Flows are contained in the DFD for Function 4.4 - DFD 4.4.

    Input logical dataflows

    Output logical dataflows

    User needs

    Number

    Description