Question

Draw Data Flow Diagrams for the following system. Starting with a context diagram, draw as many nested DFDs as you consider necessary to represent all of the details of the system described in the following narrative. Context diagram, Level-0, and Level 1 diagrams are required. You may choose to decompose to level-2, level-3, etc., if you think it’s necessary or if you would like to challenge yourself.

Urban Life Club (ULC) is an innovative young firm that sells memberships to people who have an interest in certain products. People pay membership fees for one year and each month receive a product by mail. For example, ULC has a coffee-of-the-month club that sends members one pound of special coffee each month. ULC currently has five memberships (coffee, wine, beer, flowers, and computer games) each of which costs a different amount. When people join ULC, the customer needs to provide his/her information including the name, mailing address, phone number, e-mail address, credit card information, start date, and membership service(s) (e.g., coffee). The computer game membership operates a bit differently from the others. In this case, the member must also select the type of game (action, arcade, fantasy/ science-fiction, educational, etc.) and age level. Some customers request more products than the membership included (e.g., two pounds of coffee), in which case they will need to pay for the additional costs. ULC is planning to greatly expand the number of memberships it offers (e.g., video games, movies, toys, cheese, fruit, and vegetables) so the system needs to accommodate this future expansion.

Answer 1

First let us begin with the 0 level DFD or the context diagram of the system.

Now we will show the level 1 DFD of the above system

Now we will show the level 2 dfd