Describe the three types of feedback loops. (None, Special only, Common and Special cause) Answer: - No feedback loop: A process without a feedback loop will deteriorate and decay due to entropy…

Question

Options

• ANone
• BSpecial only
• CCommon and Special cause

• A
  100% (35)

Explanation

All three options are correct because the question asks to identify all three recognized feedback loop types, each of which produces a distinct, predictable outcome on process variation. A process with no feedback loop (A) degrades over time - entropy naturally causes drift and decay without any corrective signal. A special-cause-only feedback loop (B) is actually counterproductive: treating every output fluctuation as a special event requiring intervention causes overcorrection, doubling variation in a phenomenon known as "tampering" (famously illustrated by Deming's funnel experiment). A common and special cause feedback loop (C) is the ideal - using statistical methods (such as control charts) to distinguish random noise from true signals enables genuine, sustained process improvement.

Since all three choices are correct, there are no distractors to refute - the question tests whether you know the complete set of loop types and their effects.

Memory tip: Think of the three outcomes as Decay → Chaos → Improvement. No loop = decay, special-only loop = chaotic explosion of variation, both loops recognized = improvement. The progression reminds you that more accurate feedback (not just more feedback) is what drives better outcomes.

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