WEEK 8 SYSTEM ANALYSIS AND DESIGN

 Assalamualikum and good morning to everyone today is new week 8 .. dr give a new task for today morning . task given is rules for using DFD symbol , 

and the answer is " One of the DFD development rules is that all flows must begin and end with a processing step. This makes sense because data cannot transform on its own while being processed. Using the thumb rule, it is relatively simple to identify and correct illegal data flows in a DFD. Each process must have at least one input and one output. At least one data flow in and data flow out should exist in each data store. The stored data in every system must go through a process. In a data flow diagram, each process must be linked to another process or data store."

After that , the next task is given is " According to DFD Diagram 0: Gane & Sarson type above, convert it to Yourdon De Marco type. Provide explanation of the data flow, external entities, data store and 4 processes involve Food Management System. "