Which one of the following methods is NOT suitable for determining the context of use of a cash machine?

Which one of the following methods is NOT suitable for determining the context of use of a cash machine?
A . Present the idea of the new cash machine to representative bank customers
B. Interview front-line bank clerks
C. Interview users of a current cash machine
D. Observe users while they are using a current cash machine
E. Conduct usability tests with cash machines from competitors
F. Conduct focus groups regarding user needs for future cash machines

View Answer

Answer: A