ITPEC FE Morning October 2020 Question 54
ITPEC FE Morning October 2020 — Question 54 of 80
A control chart plots measurements over time with upper and lower control limits (UCL / LCL). Points outside the limits signal an unstable process.
- •A run chart also plots data over time but has no control limits — it only shows trends.
- •The key distinction: limit lines → control chart.
Why not others:
- (a) Brainstorming — idea-generation technique, not a data analysis tool
- (b) Cause-and-effect diagram — identifies root causes (Ishikawa / fishbone), does not track data over time
- (d) Run chart — plots time-series data but lacks control limits
Key rule: Control chart = run chart + control limits. If "limit lines" appear in the question, the answer is control chart.
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