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Free Webinar on
7 QC Tools
Systematic approach to Problem Solving
Delivered by
Mehul Gandhi | Business Associate
Stat Modeller, Vadodara
www.statmodeller.com
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Stat ModellerROBUST KIT OF SOLUTIONS
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About Us
Stat Modeller is formed in 2019 providing services related to
training and consultancy for Operational Excellence, Application
of Statistical Tools and Data Science Tools to solve the problems
of various segments.
We have a team of experts who are having vast experience in
academic, industries, research, consulting etc.
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Why Stat ModellerData analysis is an immense part of any problem solving or research. In industry as well as
in research, data plays a vital role. Data is collected in a large quantity. But the challenges
are which technique to be used and how?
To overcome these challenges, Stat Modeller provides the solutions to the industries,
organizations, institutes, universities and individuals who are looking for their data to
analyze with right techniques. Stat Modeller has a team of experts who are having vast
experience in industry, academic, research, consulting etc. who are committed to provide
reliable and quick service to our valuable clients. Client satisfaction is our ultimate
objective.
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Services
Domain
Data Science
Business Transformation
in Industries
Research Projects
Training in Institutes/
Universities
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Services
Data
Science
• Machine Learning
• R and R Studio
• Python
• SAS
• SPSS
• Minitab
• Excel and Advance Excel
Business Transformation
• Six Sigma
• Lean
• 5-S
• Kaizen
• Kanban
• SPC and SQC and many more
Research Projects
• Research Projects
• Survey Analysis
• Marketing Research etc.
Institutes/ Universities
• Workshops
• Trainings
• Certification Course for Students etc.
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Our Expertise
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Clients in various Domain
Agro Economics
Agro Business Management
Dairy Economics
Home Science
Mechanical Engineering
Pharmaceutical Sciences
Financial Management
Management Studies
Business Studies
Marketing Management
Library Science
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Workshop on Basics of SPSS at
BVM College of Engineering, Vallabh Vidyanagar
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Workshop on Role of SPSS in Research at
DDU, Nadiad
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3 Days Workshop on Basics of Python at
Department of Statistics, Sardar Patel University
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2 + 1 Days Workshop on BASE SAS at
Department of Statistics, Sardar Patel University
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Training on R at
Mumbai University
Training on R at
AERC, Vallabh Vidyanagar
Training on R at
FDP, SPU
Training on R at
HRDC, Gujarat University
Training on R at
Charusat University, Changa
Training on SPSS at
Charusat University, Changa
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Know your Trainero Business Associate of Stat Modeller
o More than 7 years of industrial experience
o Trained Lean Six Sigma Black Belt
o Certified Auditor for ISO 9001
o Trained more than 250+ participants online
o Guided no of Improvement projects &
Process Time Study
o Trainer - Excel, Advanced Excel, 5S, Kaizen, Quality Tools, ISO 9001, Data Analysis and many more.
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Learning Objectives
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Webinar Content
• What is quality?
• Why Quality Improvement is much needed?
• Approach of Quality Improvement
• Various tools & techniques for Quality control & improvement.
• 7 QC Tools & its application
• Q&A Session.
www.statmodeller.com 16
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What is Quality?
Question 1
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What is Quality
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Quality
Customer Satisfaction
Continual Improvement
Involvement & improvement of all
stakeholders
Management Responsibility
Conformance to stated requirements
Fit for Use
Customer Experience
New Customer
Existing Customer
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What is Quality
www.statmodeller.com 19
Quality
Customer Satisfaction
Continual Improvement
Involvement & improvement of all
stakeholders
Management Responsibility
Resources, Time, People Moral
Supplier, Employee, all stake holder
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Why Quality Improvement?
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What is the ultimate goal of any business or organization?
Question 2
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Goal
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Traditional approach
Cost + Profit = Price
Cost
Profit
Cost
Profit
Cost
Profit
Cost
Profit
Modern approach
Price - Profit = Cost
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Goal
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Cost
Profit
Cost
Profit
Modern approach
Price - Profit = Cost Cost
Cost of Product
Cost of Waste
Cost of Poor Quality
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Approach
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Tools & Techniques
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Introduction of 7 QC Tools
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❑ Problem Solving & Process Improvement tools
❑ 1st proposed by Dr. Kaoru Ishikawa – 1968
❑ Basic Quality Tools
❑ Collecting, organizing, manipulating &
presenting data graphically.
❑ 95% problems can be solved
AnalysisIdentification
Check-sheet
Pareto Chart
Flow Chart
Histogram
Scatter Plot
Control Charts
C&E Diagram
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Why 7 QC Tools?
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❑ A fixed set of graphical tools to solve problems
❑ The basic fundamental tools to achieve quality improvement
❑ These tools help organization to tackle every day problems
❑ These tools are easy to understand and implement
❑ Do not required any complex analytical or statistical competency
❑ Rely on data
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Problem Solving Framework
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Defining the problemIdentifying the root
causesPrioritizing the root
causes
Evaluating best possible actions
Implementing best possible actions
Measuring effectiveness of action
taken
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Problem Statement
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Sales of ABC company has decrease by 15% in the year of 2019-2020 comparing to sales of year 2018-2019.
The sales in year 2018-2019 was 10,00,000 INR.
Company targeted to achieve sales or Rs. 15,00,000 by the year ending 2021.
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Root Causes?
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Data Collection
Criteria Rank
Extremely Unhappy 1
Unhappy 2
Cannot Say 3
Happy 4
Extremely Happy 5
❑ Conducted sample survey of 2000 existing customers
❑ Samples were collected using statistical sampling method
❑ Survey was conducted to analyze customer’s satisfaction.
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Data Collection
Customer ID
Customer Name
City of Customer Contact No. Overall Rating by Customer
CSS - 001 - Vadodara - 2
CSS - 002 - Surat - 1
CSS - 003 - Ahmedabad - 3
CSS - 004 - Ahmedabad - 5
CSS - 005 - Vadodara - 4
CSS - 006 - Vadodara - 1
CSS - 007 - Anand - 3
CSS - 008 - Vadodara - 5
CSS - 009 - Ahmedabad - 5
CSS - 010 - Surat - 4
Category Tally Sheet Frequency
Extremely Unhappy 668
Unhappy 560
Can not Say 127
Happy 422
Extremely Happy 223
2000TOTAL
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Check Sheet / Tally Sheet
❑ Check sheet is a systematic method to collect,
record & present the relevant data.
❑ Check sheet can be used for various purposes.
❑ Both Qualitative data & Quantitative data can be collected using check sheet.
❑ Check sheet is useful to collect attribute data
❑ Data collected using check sheet can be used as input data for other quality tools.
Category Tally Sheet Frequency
Extremely Unhappy 668
Unhappy 560
Can not Say 127
Happy 422
Extremely Happy 223
2000TOTAL
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Check Sheet / Tally Sheet
❑ When data can be observed and
collected repeatedly.
❑ When collecting data on frequency
or problems, defects, defect
locations, defects causes or any
issues.
❑ When collecting data from a production process.
When to use ? Benefits
❑ Simple to understand
❑ Strong visual communication
❑ Can be store & compare with other data
❑ Real time data
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Check Sheet / Tally Sheet
Type of Check sheet in Quality Control – Kaoru Ishikawa
1. To check the shape of the probability distribution
2. Defect Type
3. Defect Location
4. Defect Cause
5. Multi-step process tracking
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Histogram
668
560
127
422
223
0
100
200
300
400
500
600
700
800
ExtremelyUnhappy
Unhappy Can not Say Happy ExtremelyHappy
Histogram - Survey Category
❑ Graphical representation of survey
category
❑ Almost 60% customers are not satisfied.
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Histogram
❑ Histogram is a graph which represent
frequency of observation or range of
observation.
❑ Graphical summary of large data
❑ Karl Perason - 1891.
❑ Classification of data. 668
560
127
422
223
0100200300400500600700800
ExtremelyUnhappy
Unhappy Can notSay
Happy ExtremelyHappy
Histogram - Survey Category
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Histogram
❑ Numerical Data
❑ Distribution of data
❑ To compare data of different time
period
❑ To represent & communicate data
easily and effectively to others
When to use ? Benefits
❑ Easy to construct.
❑ Easy to understand different data,
it’s frequency of occurrence and
categories which are difficult to
interpret in tabular form.
❑ Helps to visualize distribution of
data.
❑ Helps to understand skewness of the data.
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Histogram
Most common shapes
of Histogram
Bell Shape Bimodal
Right Skew Left Skew
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Histogram
668
560
127
422
223
0
100
200
300
400
500
600
700
800
ExtremelyUnhappy
Unhappy Can not Say Happy ExtremelyHappy
Histogram - Survey Category
Title
Horizontal Axis
Vertical Axis
Bins / Bar
Data Lables
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Re-survey – Not satisfied customer
- How much time required to address all reasons?
- Which reason to be address?
- Which are the most potential reasons?
1. On Time Delivery
2. User Experience
3. Variety of Product
4. High value
5. Quality of Product
6. Payment Issue
7. Product Guide
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Pareto Chart / Pareto Analysis
Sr.
No.Complaint Reason
No. of
ComplaintCum. %
1 On Time Delivery 537 44%
2 User Experience 463 81%
3 Variety of Products 96 89%
4 High Value 73 95%
5 Quality of Products 30 98%
6 Payment Issue 18 99%
7 Product Guide 11 100%
1228
Reasons - Customer Unhappiness
TOTAL
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Pareto Chart / Pareto Analysis / Pareto Diagram
❑ It is a combination of Bar Graph & Line
Graph.
❑ Represents frequency of occurrence in
numbers & cumulative impact in %
❑ Data is arranged in Descending Order.
❑ Based on 80/20 Principle.
❑ Developed Vilfredo Pareto
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Pareto Chart / Pareto Analysis / Pareto Diagram
❑ To analyze cumulative impact of
reasons or causes of problem.
❑ To prioritize reasons or causes.
❑ Decision making based on fact
base data.
When to use ? Benefits
❑ Easy to construct.
❑ Easy to identify vital few causes
from trivial many.
❑ Simple but effective tool for
decision making.
❑ Helps to identify root causes
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Pareto Chart / Pareto Analysis / Pareto Diagram
Title
Horizontal Axis
Primary Vertical
Axis Secondary Vertical
Axis
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Cause & Effect Diagram / Fishbone Diagram
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Machine Material
Method Man
Not able to delivery on time
Effect
Later delivery from vendors
Poor Quality from vendors
Frequent Breakdown
Shortage of
Tools
Communication
Gap
Gaps in
process
Skills &
Competency
Lack of
Morality
Y = f(x)
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Cause & Effect Diagram / Fishbone Diagram
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❑ It helps to identify root causes of anyproblem in category.
❑ It is the result of Brainstorming
❑ 6Ms, 4S, 7Ps method used to createC&E Diagram.
❑ Evaluation of effect is based onmathematical function Y = f(x)
❑ Developed Prof. Ishikawa
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Cause & Effect Diagram / Fishbone Diagram
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❑ When the problem is clearly
defined.
❑ To identify root causes
❑ Organized possible causes in
category
❑ Decision making based on fact
base data.
When to use ? Benefits
❑ Single screen view of all possible
causes
❑ Helps to concentration on causes
by category.
❑ Effective decision making tool.
❑ Involvement of People
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y= f(x)
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Machine Material
Method Man
Not able to delivery on time
Effect
Later delivery from vendors
Poor Quality from vendors
Frequent Breakdown
Shortage of
Tools
Communication
Gap
Gaps in
process
Skills &
Competency
Lack of
Morality
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Scatter Plot
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Late delivery from vendors(No of hours)
No
t ab
le t
o d
eliv
ery
on
tim
e
(No
. of
ho
urs
)
Late delivery from Vendors
Late delivery to customer
1 Day 5 Hours
1.5 Days 10 Hours
2 Days 15 Hours
2.5 Days 20 Hours
3 Days 25 Hours
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Scatter Plot
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❑ It helps to identify relation between two
variable
❑ Plot one independent variable at a time
to have better identification of effect on
dependent variable.
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Scatter Plot
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❑ Two numerical paired data.
❑ Dependent variable may have
multiple value for each value of
independent variable
❑ To determine whether the two
variables are related or not.
❑ To identify potential root causes of
problem.
When to use ? Benefits
❑ It helps to identify relationship
between two variables.
❑ It helps to determine range of data.
i.e. maximum and minimum value
can be determine.
❑ Easy to construct & interpret.
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Scatter Plot
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Shapes of Scatter Plot
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Flow Chart / Process Map
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Requirements
Inspection
Process
Inspection
P
Inspection
Requirements
SupplierS CustomerCInput
I
Output
O
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Flow Chart / Process Map
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Supplier
Store
Process 1 Process 2 Process 3 Process 4 Output
Customer
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Flow Chart / Process Map
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❑ It is a simple representation of process
steps in sequence.
❑ It has a various shapes of boxes which
is symbol of action.
❑ It is widely use in Manufacturing,
computer programming & complex
processes.
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Flow Chart / Process Map
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❑ To explain process in sequence
❑ To identify and communicate
check-points.
❑ It helps in process time study on
early stage.
❑ To communicate start & end point
of process.
❑ It helps to clarify complex
processes.
❑ It helps to identify delay, unwanted
storage & transportations.
❑ It helps to minimize
communication gap & provide
better clarity to work.
When to use ? Benefits
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Flow Chart / Process Map
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Symbols
Start & End Point
Input / Output
ProcessProcess
Decision / Inspection
Decision / Inspection
Document / Record
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Control Chart
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Control Chart
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❑ Also known as Shewhart chart or
process behavior chart.
❑ It is used to determine process is in
control or not.
❑ It can be stated that control chart are
graphical tool to represent process
monitoring.
❑ Control chart can be used for variable
and attribute data.
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Control Chart
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❑ To monitor & control ongoing
process.
❑ To predict expected range of
outcome from a process.
❑ To analyze variation in process.
❑ To determine process is in control
or not.
❑ Can easily identify special causes
and common causes of variation.
❑ It helps to determine process
capability.
❑ It gives early warning signals in
case of process shifting to out of
limit.
When to use ? Benefits
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Control Chart
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Types of Control Chart
Control Charts
Variable Control Chart
Attribute Control Chart
X chart R Chart P Chart C Chart
Continuous / Numerical Data
Categorical /
Discrete Numerical
Data
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7 QC Tools for problem solving
Defining the problemIdentifying the root
causesPrioritizing the root
causes
Evaluating best possible actions
Implementing best possible actions
Measuring effectiveness of
action taken
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7 QC Tools for problem solving
Action Plan MatrixP
oss
ibly
Co
ntr
ol
Ou
t o
f C
on
tro
lHigh Medium Low
Solutions Solutions Solutions
Solutions Solutions Solutions
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7 QC Tools for problem solving
Action Plan
Root Cause Action Plan ResponsibilityTime to Review
Expected completion
date
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