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They
determine what the system has to offer.
What? Requirements are obtained from stakeholders and documented and put in a
structure.
How? Requirements are determined by survey techniques such as workshops and
described in a SysML model.
Where? Requirements are a direct or indirect prerequisite for most steps involved in
system development.
Guiding questions
?–  Do you ask the right people?
?–  Are the responses offi cial?
?–  Do you ask the right questions?
SysML elements
Requirement diagram, requirement (SYSMOD): categories (e.g., functional
requirement), containment, refi ne, trace.
Collect
requirements
Stakeholders
Requirements
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Of course, there will always be stakeholders who cannot be addressed directly.
For example, a lawmaker could be a stakeholder out of your reach. In this case,
you have to fi nd a suitable substitute, e.g., someone in the legal department, or
you consult the relevant legal code book.
There may be other stakeholders who are extremely hard to reach. For example,
you can ??™ t talk directly to a customer of SpeedyCar.


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