e ambiguities or omissions in the following statement of requirements for part of a ticket-issuing system: An automated ticket-issuing system 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. Once a destination has been selected, users are requested to input their credit card. Its validity is checked, and the user is then requested to input a personal identifier. When the credit transaction has been validated, the ticket is issued.
Q#1: (a): Discover and resolve ambiguities or omissions in the following statement of requirements for
part of a ticket-issuing system:
An automated ticket-issuing system 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.
Once a destination has been selected, users are requested to input their credit card. Its validity is
checked, and the user is then requested to input a personal identifier. When the credit transaction
has been validated, the ticket is issued.
(b): Write a set of non-functional requirements for the ticket-issuing system, setting out
its expected reliability and response time.
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