The tickets could be available as an email download, and hence be issued
with the booking confirmation during ‘record ticket booking’.
The customer might not be eligible to attend – possibly on age grounds – and
so the booking would have to be rejected.
Investigating such questions helps to uncover the business rules that apply to the
processes. In the example above, the business rules might be age related, as
suggested – perhaps this is an event with a lower age limit of 18 years. Another
potential eligibility rule could be that when there is a group booking there has
to be at least one person over 21 years old. Alternatively, there could be a
prerequisite – for example, to attend a radio show a person might have to submit
questions in advance in order to gain attendance information. Examining the
transitions between tasks a