CTAL-ATT: Certified Tester Advanced Level Agile Technical Tester

The following user story has been written for a new application under development to pre-book a space at a National Car Park.

As a vehicle driver—

I want to pre-book a car parking space online, choosing a disabled driver's space if required,

so that I can pay in advance and receive confirmation of my parking space number.

The following acceptance criteria have also been written:

• Payment may be made through PayPal, Debit or Credit Card.
• Confirmation of payment and car parking details should be sent once the booking process is complete.
• Driver information is stored in the reservation database.

The database was built and tested in a previous sprint, but the interfaces to the different payment methods have not yet been developed.

As a tester in an agile team, you have been asked to review the user story. You have identified some issues with this story:

• It must cater for different user groups: a driver or disabled driver.
• It must cater for different vehicle types: a car, 4x4, van or motorbike.
• There are no acceptance criteria concerning how fast the booking process should be.
• The method for sending confirmation of payment and space number, and other important details, has not been specified.
• A stub will be needed to test the payment method.

Which pair of requirements engineering techniques are you MOST LIKELY to have used to identify these issues?