Defined for computer-based system

Assignment Help Basic Computer Science

Reference no: EM133195940

1. Identify and briefly describe four types of requirements that may be defined for a computer-based system.

2. Discover ambiguities or omissions in the following statement of the requirements for part of a ticket-issuing system:

An automated ticket machine sells rail tickets. Users select their destination and input a credit card and a personal identification number. The rail ticket is issued and their credit card account charged. When the user presses the start button, a menu display of potential destinations is activated, along with a message to the user to select a destination and the type of ticket required. Once a destination has been selected, the ticket price is displayed and customers are asked to input their credit card. Its validity is checked, and the user is then asked to input his or her personal identifier (PIN). When the credit transaction has been validated, the ticket is issued.

3. Rewrite the above description using the structured approach described in this chapter. Resolve the identified ambiguities in a sensible way.

4. Suggest how an engineer responsible for drawing up a system requirements specification might keep track of the relationships between functional and non-functional requirements.

5. Using your knowledge of how an ATM is used, develop a set of use cases that could serve as a basis for understanding the requirements for an ATM system.

Reference no: EM133195940

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