Every night, at midnight, a system automatically raises invoices for customers that have placed orders that day. The invoice is sent electronically by email to customers.
What is the event that triggers the production of invoices?

An analyst is defining the requirements for an online booking system and wishes to show the business managers the look and feel of the system in order to elicit usability requirements.
What investigation technique should the analyst use?

When are the acceptance criteria for user acceptance testing defined?

A batch program runs every night to raise invoices. The next day these invoices are posted out to customers by a clerk. Customers pay the invoices with cheques. The cheques are then banked by a clerk.
In this scenario, which of the following represents a business event?

Which of the following investigation techniques is MOST appropriate for collecting quantitative information?