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Tools to control quality (Histogram (Purpose (Prioritise, identify…
Tools to control quality
Histogram
Distribution data
Min/Max/Mean
Trends/patterns
Purpose
Prioritise
identify outliers
Control chart
Standard expectation
Outliers
Upper range
lower range
Purpose
monitor
Take action on trends
Scatter diagram
Relationships
Identify/group
Purpose
cause
commonalities
Pareto chart
Purpose
greatest impact
focus efforts
Greatest return
80:20
Checklist
Tally
Qualitative data
Purpose
Quick measure
Cause and effect diagram
Fishbone
Visual tool
Purpose
identify cause
narrow down
Stratification
Dividing
Categorising
Purpose
Gather meaningful data
Identify trend
identify cause