Low Level Function
4.4.7 Manage use of Additional Vehicles

Overview

This Function shall be capable of providing the following facilities:

(1) The ability to manage and co-ordinate the use of PT Vehicles that are not currently in use.
(2) The ability to use these additional PT Vehicles as substitutes for faulty vehicles, or to re-enforce those on a particular service, either due to high Passenger loadings or delays.

Functional Requirements

(a) continuously monitor for the receipt of the unused PT vehicle status and the additional PT vehicle required data flows
(b) when the data flow in (a) is received check the internal data to find any PT vehicles that are available
(c) when an available PT vehicle is found, send the details to the PT Driver Management function in the revised driver service instructions data flow
(d) also send the PT vehicle details to the Optimise PT Fleet Control function in the additional PT vehicle available data flow.

Diagrams

The Diagram(s) is (are) the diagram(s) where you can find the function :
  • DFD 4.4 Control PT Fleet
  • Functional Tree of Area 4

    • Parent Higher Level Function

    Input logical dataflows

    Output logical dataflows

    User needs

    Number

    Description

    10.1.0.1
    The system shall provide effective and attractive PT.
    10.1.3.1
    The system shall be able to identify an incident and make arrangements for the care for the passengers.
    10.1.3.2
    The system shall be able to schedule PT operations dynamically so that incidents or unexpected events can be handled with the minimum disruption.