Redraw each of the routines so that they conform to the guidelines and other techniques presented in the text for drawing systems flowcharts. HINT: Be alert to the description of each routine; the descriptions should govern your solution.
PART 2: Figure TB-4.3 shows a context diagram a cash sales system. The diagram intentionally violates several of the guidelines and other techniques presented in the text for drawing data flow diagram.
Identify as many of the errors in data flow diagram construction as you can. In the diagram, place consecutive numbers (each in a circle) next to the points at which the errors exist. On your solution sheet, list the numbers and write a one- to two-sentence description of each error and what the correct procedure should be. Error 1 is provided as an example of how to construct the solution.
Error Error Description
1 Data flows should not connect two external entities. Depending on the extent of the system being analyzed, either the mail room or the bank entity should be eliminated [or be brought (documented) within the system].
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