Scenario “Tax system”
The tax system needs to be updated due to new legislation. For a person with a salary of less than
€ 20.000 and who is married, the tax needs to be re-calculated. If the person also has more than
two and less than five children, an additional 10% reduction is applicable.
The functionality of the newly released tax system is now at the right level. However, there are
frequent complaints about non-functional issues. In particular:
ithe new system does not run on PC’s with VISTA installed
iiit is difficult to update the system quickly when new legislation
must be implemented
iiiespecially when many users are using the web site, the system
seems to be slow
ivsome users enthusiastically use the system but are not able to

complete some of the transactions
Which TWO types of risks are related to complaint (i) and (ii)?

A.
Functionality

B.
Usability

C.
Efficiency

D.
Portability

E.
Maintainability

Explanation: