Assume you are working on a CAS (Conditional Access System) for Pay-TV that allows the
access, selection and transfer of services and media to authorized users. Authorized users can
choose their services through different channels: Web Customer Portal, IVR (Interactive Voice
Response), Call Centre and SMS. The system uses a Smart Card to receive and decrypt the
broadcasted encrypted control words which allow decrypting pay-per-view TV. Every authorized
user must have a Smart Card and a Set-Top Box to view the contents.
The following is an excerpt from the product risk analysis document:

Both likelihood and impact have been rated on the following scale: (1 – Very low, 2 – Low, 3 –
Medium, 4 – High, 5 – Very High).
The required test environment and code have been delivered. All test cases for each identified
product risk item have been written and are ready to be executed. The Database used to contain
the Smart Cards is empty and so only new Smart Cards can be used during test execution.
A Smart Card can only be activated if it has been previously pre-activated. This means the postconditions for the execution of the test cases to test the pre-activation of the Smart Card are the
pre-conditions for activation of the Smart Card.
Which of the following statements represents the most effective contribution of the stakeholders to
the completion of the failure mode analysis table?

A.
The aircraft pilot and the customer representative should contribute to assess the detection.
The chief software engineer, the system architect and the expert tester should contribute to
assess the priority.

B.
The aircraft pilot and the customer representative should contribute to assess the priority. The
chief software engineer, the system architect and the expert tester should contribute to assess the
detection.

C.
The system architect and the chief software engineer should contribute to assess the priority.
The expert tester is the only one who should contribute to assess the detection.

D.
The aircraft pilot is the only one qualified to contribute to assess the priority and thus should be
assigned this task. The customer representative should contribute to assess the detection.

Explanation: