Sommerville-Software-Engineering-10ed

15.3 ■ Software product lines 449
Interaction
User interface
I/O management
User
authentication
Resource
delivery
Query
management
Resource management
Resource
tracking
Resource policy
control
Resource
allocation
Figure 15.8 The
architecture of a
resource management
system
Database management
Transaction management
Resource database
Interaction
I/O management
Operator interface
Comms system
interface
I/O management
Resource management
Operator Map and route
authentication planner
Report
generator
Query
manager
Resource management
Vehicle status
manager
Incident
logger
Vehicle
dispatcher
Equipment
manager
Vehicle
locator
Database management
Figure 15.9 A productline
architecture
of a vehicle
dispatcher system
Equipment
database
Transaction management
Vehicle database
Incident log
Map database
2. At the I/O management level (level 2), components handle operator authentication,
generate reports of incidents and vehicles dispatched, support map output and route
planning, and provide a mechanism for operators to query the system databases.
3. At the resource management level (level 3), components allow vehicles to be
located and dispatched, update the status of vehicles and equipment, and log
details of incidents.
4. At the database level, as well as the usual transaction management support,
there are separate databases of vehicles, equipment, and maps.