Constructing Context Diagram and Data Flow Diagrams:

Background:

You decided to start a mobile auto detailing service that will visit customers at their homes or businesses,

and use traditional, high-quality hand washing and waxing methods. In addition to retail customers,

several auto dealers have expressed interest in your services, and you are eager to get started. You plan

to hire college students as technicians, train and supply them, and offer them a share of the profits as an

incentive.

Your friend, who is an IT major, offered to help you design an information system. She/he suggested that

you prepare an initial context diagram and a DFD diagram 0 outlining the main aspects of the system

design. You plan to use the system to keep track of employees, retail customers, auto dealer accounts

and suppliers. You will also keep track of customers data, employee information and an operations log,

among other things.

Tasks:

1. Create a context diagram for the new system.

2. Create a diagram 0 for the new system.

3. Decompose diagram 0 to lower level diagrams until a functional primitive is reached.

4. Check if the diagrams are levelled and balanced correctly.

Your design should address needs that would be typical in a small business of this kind. Use your

imagination for any additional user/system requirements you think are necessary for the design.