QCL-14-v3_Pareto Diagram_SIMSREE_Aditi Chavan

Introduction to Pareto DiagramPareto chart is used to graphically summarize

and display the relative importance of the differences between groups of data

It is one of the seven basic tools of quality controlThe independent variables on the chart are

shown on the horizontal axis and the dependent variables are portrayed as the heights of bars

The values of the statistical variables are placed in order of relative frequency, the graph clearly reveals which factors have the greatest impact and where attention is likely to yield the greatest benefit

Ref- http://www.isixsigma.com/tools-templates/pareto/pareto-chart-bar-chart-histogram-and-pareto-principle-8020-rule/

http://whatis.techtarget.com/definition/Pareto-chart-Pareto-distribution-diagram

Stratification of symptoms of the selected problems

Improper planning Use of bad quality raw materials Improper mixing of raw material cause low

quality final product Unskilled workforce Improper drainage during monsoon Negligence of maintenance of the roads

Stratification of symptoms• Administrative /political

1. Improper distribution of road contracts/tenders2. Corruption / Malpractices in the construction of

roads

• Functional 1. Lack and improper maintenance2. Use of old techniques (use of tar and gravel) for

making roads3. Use of unskilled workforce4. Improper or leaked drainage system that weakens

the soil beneath the road

• Climatic conditions1. High temperature - Causes tar to melt and become

loose and pull away from the road 2. Rainy season - Use of Improper gravel size causes

the water to get into the pavement or be stationary on it

The team did a survey to find out the major symptoms that accounted for 80% frequency

Number of roads analysed – 30Gathered information from localities about :

Number of potholes in the road in different seasonHow many times the road was reconstructedUse of any unfair means in the constructionMaintenance of the roadMaterial used in the construction/maintenance of

the road Is the technique used for construction the main

symptom

Identification of symptoms

Cont ..Below given are the team findings: (Assumption: For each road we have considered

only the major factor)

Pareto ChartSymptoms Accounting for 80% of the frequency

Problem Definitions of symptomsThe three main symptoms identified are

Improper Distribution of Road ContractCorruption / Malpractices in the construction of

roadsLack or improper maintenance

Problem Description Improper Distribution of Road Contracts:

i. Work taking place on irregular phases

ii. No surveillance on the contractorsiii. Roads constructed before monsoon in a short

period and in haphazard manner

Cont..Corruption / Malpractices in the construction of

roads:i. Use of low quality material

ii. Use of unskilled laboursiii. Sometimes just a thin layer of tar and gravel is

spread on the old pavement

Lack or improper maintenance:i. Zero or low maintenance of the roads

ii. Temporary repair done which is not long lasting iii. Roads dig for drainage or other purpose are not

reconstruction properly

Team Learning Using the Pareto Chart the team was able to find

the various symptoms that accounted for Potholes in the city

With the help of this quality control tool we were able to distinguish the major symptoms

The major symptom that has accounted for the potholes in the city is the improper distribution of contracts or tenders, lack of maintenance and malpractices during construction of road

Government should perform regular surveillance to check the progress of the road construction and quality of material used

Proper maintenance of the roads can minimize the potholes

THANK YOUTHANK YOU