I want to draw a o level and i-n level diagram for a bus garage repair
DFD Example: Bus Garage Repairs (cont’d)
External Entities: Bus, Mechanic, Helper,
Supervisor, Inventory Management System,
Accounting Department, etc.
Key process (“the system”): performing repairs
and storing information related to repairs
Processes:
Record Bus ID and reason for repair
Determine parts needed
Perform repair
Calculate parts extended and total cost
Record labor hours, cost
DFD Example: Bus Garage Repairs (cont’d)
Data stores:
Personnel file
Repairs file
Bus master list
Parts list
Data flows:
Repair order
Bus record
Parts record
Employee timecard
Invoice
