How To Choose The Right Six Sigma Chart


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There are so many different kinds of charts. How do you decide which one to choose? One of our customers asked for a "cheat sheet" so here it is.

If your data is organized by... And your data looks like this in Excel... Choose one of these charts...
Category
(e.g., type of defect, city, state, country, male/female, etc.)
Headings + Integers or Decimals:

Pareto Chart

Bar Chart

Cause and effect
(e.g., calories vs weight gained, variation vs warranty claims, etc.)
Two columns/rows of numbers:

Scatter Chart

Matrix Plot

Time
Attribute Data
(days, hours, batch number, lot number, etc.)
One column of Integers

c Chart

Time

Attribute Data
(Counted)
Headers (time, lot number)
1. Defects (Integer)
2. Sample size (contant integer)

np Chart

Time
Attribute Data
(Counted)
Headers
1. Defective items (Integer)
2. Sample size (variable integer)

p Chart

Time

Attribute Data

(Counted)

Headers
1. Defects (Integer)
2. Sample size (variable integer)

u Chart

Time

Variable Data

(Measured)

Headers (time, lot number)
1. Decimals

XmR Chart

Histogram

Time

Variable Data

(Measured)
Headers (time, lot number)
2-5 columns of Decimals

XbarR Chart
XMedianR

Histogram

Time

Variable Data

(Measured)
Headers (time, lot number)
5-25 columns of Decimals

XBarS Chart

Histogram


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