A systems engineer or customer usually has a rather holistic view. I myself
take the view based on the INCOSE defi nition of a system [45].
A system is an artifact created by humans and consisting of system blocks
that, together, pursue a goal. A block can be software, hardware, an individual, or
any other unit.
The system under development interacts with individuals and other systems.
Its boundary is an important piece of information: What belongs to my system and
what ??™ s outside of it? This question can be answered in an early project phase??”at
least in part. We already know who will interact with the system. That ??™ s the nature
FIGURE 2-11
The approach model for modeling the system context.
act Model system context
Identify system
actors
System context
Requirements
Identify system
interaction points
System context
[interaction points]
System context
[information flow]
System context
Requirements
System context
Model system/actors
information flow
System context
47
of the matter: I ??™ ll hardly have an idea or even a concept for a system unless I know
who will operate it.
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