What is the advantages and disadvantages of data flow diagram?

Answer 1

Advantages of data flow diagram:

· A simple graphical technique which is easy to understand.

· It helps in defining the boundaries of the system.

· It is useful for communicating current system knowledge to the users.

· It is used as the part of system documentation file.

· It explains the logic behind the data flow within the system.

Disadvantages of data flow diagram:

· Data flow diagram undergoes lot of alteration before going to users, so makes the process little slow.

· Physical consideration are left out.

· It make the programmers little confusing towards the system.

· Different DFD models have different symbols like in Gane and Sarson process is represented as rectangle where as in DeMarco and Yourdan symbol it is represented as eclipse.