Overview

This Function shall be capable of providing the following facilities:

(1) The ability to take responsibility for the management of data about incidents and the production of statistical reports.
(2) The ability to receive data about reported incidents and updates to that data from other functionality and incident data from other entities outside the System.
(3) The ability to load all the data that is received into the store of Incident Data.
(4) The ability to retrieve data from the store of Incident Data for assessment, when requested by other functionality in the System.
(5) When a request is received from the functionality providing the HMI for the Road Network Operator, the ability to retrieve the data from the store of Incident Data and produce the required incident statistics reports.

Functional Requirements

(a) when the first trigger input data flow is received, the data that it contains shall be loaded into the store of Incident Data
(b) when the second trigger input data flow arrives, if the request is for incident data the required data shall be obtained from the store of Incident Data
(c) as a result of (b) the data shall be sent to the Operator interface Function in the first trigger output data flow
(d) if the second trigger input data flow in (b) contains revised incident data, the data in the store of Incident Data shall be updated
(e) if the second trigger input data flow in (b) requests a report, the required data shall be retrieved from the store of Incident Data
(f) the data produced in (e) shall be processed into statistical form, and sent to the Operator interface Function in the first trigger output data flow
(g) when the third trigger input data flow is received, the data it contains shall be loaded into the store of Incident Data
(h) when the fourth trigger input data flow is received, the data about current and future incidents from the store of Incident Data shall be retrieved
(i) the data retrieved in (f) shall be sent to the assessment Function in the second trigger output data flow
(j) when the fifth trigger input data flow is received, the data it contains shall be loaded into the store of Incident Data
(k) loading and obtaining data from the store of Incident Data shall use the other output and input data flows respectively
(l) of the above, the activities in (h) and (a) shall take absolute priority over all other activities within the Function
(m) the integrity and contents of the store of Incident Data shall be maintained and managed to make most efficient use of the space available whilst optimising data access time.

Diagrams

Parent Higher Level Function

• 3.2 Manage Incidents

Input logical dataflows

• mt_incident_statistics_request
• mt_new_incident_data
• mt_read_incident_data
• mt_request_for_stored_incident_data
• mt_request_incident_data
• mt_updated_incident_data

Output logical dataflows

• mt_incident_data_for_assessment
• mt_incident_statistics_response
• mt_load_incident_data
• mt_requested_incident_data

User needs