You are to submit TWO DFDs this week. The context diagram and the level 0 diagram (next level up).
The context diagram ONLY depicts the system in the middle, with inputs on the left and outputs on the right.
The Level 0 diagram shows the data stores (data bases) in the center of the diagram, processes (numbered as shown in the text) , and the entities outside of the processes. Arrows are drawn to show how data is moving from the entities, to the processes, and into the data stores and out of the data stores. One of the more common mistakes is not showing anything coming out of the data store! There needs to be text on the lines of the arrows describing what information is moving.
Also, if you have multiple processes in your system (as you should), You only want to see DFDs for no more than two processes (plus the context diagram).
Attachment:- proposal_dss_0.rar