Automation System
A semi-continuous operation means:

None of these
the operation is continuous each shift, but stops between shifts
coffee breaks are allowed for the operator
a computer is a required part of the machine
each operation in a sequence is continuous, but subsequent operations in the sequence may be different.

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Automation System
Trend analysis:

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

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