Pareto analysis tool

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Trivial many Vital few

description

 

Transcript of Pareto analysis tool

Page 1: Pareto analysis tool

Trivial many

Vital few

Page 2: Pareto analysis tool

FICCI CE

Pareto analysis

The Pareto principle is to concentrate on “vital few” rather than “trivial many” in tackling quality problems.

The Pareto diagram is a tool for identifying few actually important causes for defectives which result in large proportion of defectives, instead of concentrating on large number of causes which contributes to a small proportion of the total defectives.

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FICCI CE

80 : 20

A term referring to the Pareto principle, which was first defined by J.M. Juran in 1950. The principle suggests most effect come from relatively few causes; that is 80% of the effects come from 20% of the possible causes.

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FICCI CE

Constructing a Pareto chart

A Pareto diagram is a bar chart of number of defectives with bars representing the number of defectives due to different sources arranged in descending order of their importance. A line graph of cumulative number of defectives (Ogive) is also drawn in the same chart. The causes are given along the x axis, the number of defectives are given on the left y axis and the cumulative %defectives is given along the right y axis.

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FICCI CE

Constructing a Pareto chart

Data on defective cords

S No. Source of defectives No. of Percentage defectives defectives

1 Wrong Ply TPM 75 252 Plyless Feeding 150 503 Single end 30 104 Wrong Cable TPM 45 15

Total 300 100

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FICCI CE

Arranging data in descending order

Data on defective cords

S No. Source of defectives No. of Percentage Cumulative defectives defectives % defectives

1 Plyless Feeding 150 50 502 Wrong Ply TPM 75 25 753 Wrong Cable TPM 45 15 904 Single end 30 10 100

Total 300 100

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FICCI CE

Pareto analysis of defective cords

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300 100%

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0%Plylessfeeding

Wrong plyTPM

Wrongcable TPM

Singleend

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FICCI CE