As part of an investigation a Business Analyst has devised a form for users of an existing system to use to keep track of the tasks they undertake during their working day.
Which of the following describes this investigation technique?

Which of the following options only includes workshop discovery techniques?

What are subsequent changes subject to once a requirements document has been signed off?

A business analyst has identified that one of the use cases on a use case diagram contains a large amount of optional processing. This optional processing is so large that he has decided to remove it to a separate use case which can be called by the original use case if required.
How should the original use case be linked to the new use case?

An IT department needs to upgrade its hardware to run the new version of an established operating system. The cost of this required upgrade is $2 million. As an alternative, the IT director has suggested that the company should change to a completely different operating system. Although this will cost $6 million, the change will bring many other benefits, including cheaper maintenance costs and increased security.
What is the avoided cost in his proposal?