Distinguish between An open-loop system and a closed-loop system.

CPA-Quantitative-Analysis-Section-4 BLOCK RELEASE

Open-loop system
This refers to a system that does not act in a controlled manner, that is, there is no feedback loop, and so no measure of performance against standards.
CLOSED-LOOP SYSTEM
This refers to a system that functions in a controlled manner. Such a system accepts inputs, works on them according to some predefined processing roles and produces outputs. Such a system is controlled via a feedback loop.

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