Question

GUIDELINES:

 Context diagram should fit to one page.

 Use the mane of information system as the process name in the context diagram. Context diagram

shows the entire information system as if it is a single process.

 Use unique names within each set of symbols.

 Do not cross lines. Restrict number of symbols in any DFD (lower level – not more than 9 process symbols). Duplicate entity or data store if needed.

 Provide a unique name and reference number for each process.

TASK.

You own a small shop that produces simple electronic devices and sells them to customers. Create a DFD to illustrate product sales system.

 Create list of activities and group them in logical fashion.

 Create context level DFD.

 Create level 0 DFD.

 Construct level 1-n DFD

Answer 1

For a shop that produces simple electronic devices and sells them to customers, the below external entities are involved:

• Component vendors
• Device Designers
• Packing material vendors
• Test Instrument suppliers
• Buyers

The Level 1 processes are as follows:

• Assemble devices
• Perform QC/ Testing
• Packaging
• Pricing
• Selling
• Make Payments

The Level 2 has been detailed for the Finance process.

Please find the Level 0, 1 and 2 DFD diagrams below.