Automation System
Analog and digital controllers:

All of these
None of these
can be changed with equal case
cost the same to build
accept the same input signals

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Automation System
An operating system:

All of these
can help reduce software development time
None of these
provides ability for other programmers to understand the software structure
is useless in most control applications

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Automation System
Trend analysis:

requires a very expensive system to implement
can improve control system response
is used only in financial planning
None of these
is a brand new concept

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