Unformatted text preview: II. Draw the Level-0 Diagram a. Think of ways to decompose the process box into 3-5 two-word phrases (in Verb-Direct Object form); write them down. Analyze your choices to see if they cover everything the system does. b. Sequentially order the 3-5 phrases; draw the process boxes in left-to-right sequential order. c. Draw the same outside entities as you had on the Context Diagram d. Draw the same DFs that connected with the OEs on the CD, but now link them each to/from the most appropriate level-0 process box. e. Identify data flows that occur between processes; draw and label them f. Identify data stores; draw and label them g. Identify data flows between processes and data stores; draw and label them h. Make sure no rule violations exist i. [repeat checks i.-v. from CD list above] ii. DFs, OEs, and process labels are noun phrases; processes are verb phrases iii. Check for DFD consistency between the CD and the Level-0....
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- Fall '10
- Noun phrase, level-0 diagram, process box, ii. DFs