 |
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|
|
|
|
|
|
|
|
|
|
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|
|
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| ä |
Real-time
and embedded systems
|
|
|
|
ä |
Receives
data from the environment
|
|
|
|
ä |
Returns
results sufficiently quickly to affect the
|
|
environment
|
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|
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ä |
Process
control systems (manufacturing,
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|
refining),
Automated Teller Networks (ATM),
|
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|
Telephone
switching systems, Hospital patient
|
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|
monitoring
systems, operating systems
|
|
|
|
ä |
Distinction
from on-line systems is usually
|
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|
because
of performance requirements or
|
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|
because
responses depend on the system’s state
|
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|
|
ä |
These
systems are typically harder to build than
|
|
|
transaction
processing systems, they require
|
|
|
|
more
analysis and design work
|
|
|
|
ä |
Hard
real-time => if a performance deadline is
|
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|
missed,
the result can cause human injury or
|
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|
major
financial damage
|
|
