7QC Tool - Quality Journey , Myth about Quality :- Cost of Quality Check Sheet Histogram Pareto Chart Cause and Effect Diagram Control Charts Scatter Diagram Process Flow Diagram EFFECT is “WHAT?” Happens CAUSE is “WHY?” it Happens EFFECT = RESULT OR OUTCOME CAUSE = REASON(S) OR FACTOR(S) CONTRIBUTING TO THE EFFECT Quality Definition :- Doing the right thing , right at first time and every time, meeting customer’s & investor’s expectations .

1. Quality Journey by Nilesh Jajoo
Quality Journey
Session -1 Introduction to 7QC Tools

2. Quality Journey by Nilesh Jajoo
Quality Journey
QualityControl
1930’s
Qualityassurance
&
QualityCircle
1960’s
TQM
1970’s
Six Sigma
1980’s
ISO
1990’s
COPC VSM FMEA Poka -Yoke 5S KANO PDCA 7QC Tool

3. Quality Journey by Nilesh Jajoo
Quality Definition
Quality is defined from customer’s point of view as anything that
enhance their satisfaction
William Edwards Deming ( Oct 14,1900– Dec 20 1993)
Fitness for use .Those product features which meet the needs of
customer and there by provide product satisfaction .Freedom from
deficiencies
Joseph Moses Juran ( Dec 24, 1904 -- Feb 28 , 2008)
My Definition :-
Doing the right thing , right at first time and every time,meeting
customer’s & investor’s expectations .

4. Quality Journey by Nilesh Jajoo
Myth about Quality :- Cost of Quality
Higher the
Quality
Higher the
Cost
Higher the
Quality
Lower the
Cost
Cost of waste
Cost ofRework
Cost of overproduction
Myth Fact

5. Quality Journey by Nilesh Jajoo
Cant be measured cant be improved
350 400 450 500 550 600
Something which can’t
be measured
Can’t be Improved
Repeat Quality AHT
CSAT/SSAT NPS FCR
Weight Speed Height
Temperature
Shrinkage
Attrition

6. Quality Journey by Nilesh Jajoo
7 QC Tool
Process Flow Diagram
Scatter Diagram
Control Charts
Cause and Effect
Diagram
Pareto Chart
Histogram
Check Sheet
A structured, prepared form for collecting and analyzing data; a generic tool that can be
adapted for a wide variety of purposes.
The most commonly used graph for showing frequency distributions, or how often each
different value in a set of data occurs.
(also called as Vital Few Trivial Many) : Shows on a bar graph which factors are more significant
(also called Ishikawa or fishbone chart): Identifies many possible causes for an effect or
problem and sorts ideas into useful categories.
Graphs used to study how a process changes over time.
Graphs pairs of numerical data, one variable on each axis, to look for a relationship
A pictorial presentation of the process flow , helping in identifying the input and output for
each activity in the process

7. Quality Journey by Nilesh Jajoo
Check Sheet
When to Use a Check Sheet
When data can be observed and collected repeatedly by the same person or at the same location.
When collecting data on the frequency or patterns of events, problems, defects, defect location, defect causes, etc.
When collecting data from a production process.
Check Sheet Procedure
Decide what event or problem will be observed. Develop operational definitions.
Decide when data will be collected and for how long.
Design the form. Set it up so that data can be recorded simply by making check marks or
Xs or similar symbols and so that data do not have to be recopied for analysis.
Label all spaces on the form.
Test the check sheet for a short trial period to be sure it collects the appropriate data
and is easy to use.
Each time the targeted event or problem occurs, record data on the check sheet
Example :-
Quality audit
format
CSAT RCA
format
Repeat RCA
format
Time and
motion

8. Quality Journey by Nilesh Jajoo
Histogram(1)
When to Use a Histogram
• When the data are numerical.
• When you want to see the shape of the data’s distribution, especially when determining whether the output of a process is
distributed approximately normally.
• When analyzing whether a process can meet the customer’s requirements.
• When analyzing what the output from a supplier’s process looks like.
• When seeing whether a process change has occurred from one time period to another.
• When determining whether the outputs of two or more processes are different.
• When you wish to communicate the distribution of data quickly and easily to others.
Typical Histogram Shapes and What They Mean
Normal. A common pattern is the bell–shaped curve known as the “normal
distribution.” In a normal distribution, points are as likely to occur on one side of the
average as on the other. Be aware, however, that other distributions look similar to the
normal distribution.
Statistical calculations must be used to prove a normal distribution. Don’t let the name
“normal” confuse you. The outputs of many processes—perhaps even a majority of
them—do not form normal distributions, but that does not mean anything is wrong
with those processes. For example, many processes have a natural limit on one side
and will produce skewed distributions. This is normal — meaning typical — for those
processes, even if the distribution isn’t called “normal”!

9. Quality Journey by Nilesh Jajoo
Histogram(2)
Skewed.:-
The skewed distribution is asymmetrical because a natural limit prevents outcomes on one
side. The distribution’s peak is off center toward the limit and a tail stretches away from it.
For example, a distribution of analyses of a very pure product would be skewed, because
the product cannot be more than 100 percent pure. Other examples of natural limits are
holes that cannot be smaller than the diameter of the drill bit or call-handling times that
cannot be less than zero. These distributions are called right – or left–skewed according to
the direction of the tail.
Double-peaked or bimodal.
The bimodal distribution looks like the back of a two-humped camel. The outcomes of
two processes with different distributions are combined in one set of data. For example, a
distribution of production data from a two-shift operation might be bimodal, if each shift
produces a different distribution of results. Stratification often reveals this problem.
Plateau Edge peak Comb. Truncated or heart-cut..

10. Quality Journey by Nilesh Jajoo
Pareto (80/20 principle)
The Pareto analysis is also known as the 80/20 rule because it is based on the idea that 80 percent of a project's benefit can
come from doing 20 percent of the work. Conversely, 80 percent of a situation's problems can be traced to 20 percent of the
causes.
When to Use a Pareto Chart
When analyzing data about the frequency of problems or causes in a process.
When there are many problems or causes and you want to focus on the most significant.
When analyzing broad causes by looking at their specific components.
When communicating with others about your data.
Pareto Chart Procedure
Pareto analysis begins by ranking problems from highest to lowest in order to fix
priority
The cumulative number of problems is plotted on the vertical axis of the graph against
the cause/phenomenon
 Pareto by Causes e.g. Man, Machine, Method etc.
Pareto by Phenomenon e.g. Quality ,Cost, Delivery
Tells about the relative sizes of problems indicates an important message about
biggest few problems, if corrected, a large % of total problems will be solved

11. Quality Journey by Nilesh Jajoo
Fish Bone (Cause and Effect)
Process Policy
People
Plant
Effect
Cause
Cause
• EFFECT is “WHAT?”Happens
• CAUSE is “WHY?” it Happens
• EFFECT = RESULT OR OUTCOME
• CAUSE = REASON(S) OR FACTOR(S) CONTRIBUTING TO
THE EFFECT
5 WHY’s is the additional process aligned
People Policy Procedure Plant Environment
ISHIKAWA DIAGRAM or FISH BONE
DIAGRAM
The cause and effect diagram was developed by
Dr. K. ISHIKAWA to represent the relationship
between EFFECT or PROBLEM and all the
possible CAUSES influencing it. For every EFFECT
there are likely to be several CAUSES.
The major causes can be summarized generally
under four categories known as 4M’s
—MAN,MACHINE,MATERIAL & METHOD, OR
4P’s – PLANT,POLICY,PEOPLE,PROCEDURE

12. Quality Journey by Nilesh Jajoo
Process Flow
When to Use a Flowchart
• Todevelop understanding of how a
process is done.
• Tostudy a process for improvement.
• Tocommunicate to others how a process
is done.
• When better communication is needed
between people involved with the same
process.
• Todocument a process.
• When planning a project
Start /End
Preparation Display
Y
N
Process Decision Predefine Process
Data storage
Documents
Delay
Commonly used symbols
Manual Input
Extract
• Testingthe Flow
• Arethe processstepsidentifiedcorrectly?
• Isevery feedbackloopclosed?
• Does every arrowhaveabeginningandendingpoint?
• Isthere morethanonearrow from anyactivitybox? Perhapsit couldbea diamond.
• Areallthe stepscovered?
Important
Points

13. Process Flow (sample)
Customer calls
Call
Answered?
No
Yes
Enter
customerdetails
in the system
Take
order
details
Confirm
payment
type
Credit card?
Take
card
details
Yes
No
Deliver &
collect money,
if non-credit card
customer
Dispatch Order
Activity :-Practice Process Flow

14. Quality Journey by Nilesh Jajoo
Control Chart (1)
The control chart is a graph used to study how a process changes over time. Data are plotted in time order. A control chart
always has a central line for the average, an upper line for the upper control limit and a lower line for the lower control limit.
These lines are determined from historical data. By comparing current data to these lines, you can draw conclusions about
whether the process variation is consistent (in control) or is unpredictable (out of control, affected by special causes of
variation).
Control charts for variable data are used in pairs. The top chart monitors the average, or the centering of the distribution of
data from the process. The bottom chart monitors the range, or the width of the distribution. If your data were shots in target
practice, the average is where the shots are clustering, and the range is how tightly they are clustered. Control charts for
attribute data are used singly.
When to Use a Control Chart
When controlling ongoing processes by finding
and correcting problems as they occur.
When predicting the expected range of outcomes from
a process.
When determining whether a process is stable (in
statistical control).
When analyzing patterns of process variation from
special causes (non-routine events) or common
causes (built into the process).
When determining whether your quality improvement
project should aim to prevent specific problems or to
make fundamental changes to the process.

15. Quality Journey by Nilesh Jajoo
Control Chart (2)
80%
78%
82%
84%
86%
88%
90%
Wk1 Wk2 Wk3 Wk4 Wk5 Wk6 Wk7 Wk8 Wk9 Wk10
Control Chart
USL Target LSL NPS
USL
LSL
Target
Special
Cause
Special
Cause
USL :- Upper Specified limit --An upper specification limit, also known as an upper spec limit, or USL, is a value below which
performance of a product or process is acceptable
LSL :- Lower Specified limit --A lower specification limit is a value above which performance of a product or process is acceptable. This is also known
as a lower spec limit or LSL
UCL :- Upper Control limit LCL :- Lower Control limit

16. Quality Journey by Nilesh Jajoo
Scatter Diagram
Definition :-
Scatter plots are used to plot data points on a horizontal and a vertical
axis in the attempt to show how much one variable is affected by
another. Each row in the data table is represented by a marker whose
position depends on its values in the columns set on the X and Y axes.
When to Use a Scatter Diagram
When you have paired numerical data.
When your dependent variable may have multiple values for each value of
your independent variable.
When trying to determine whether the two variables are related, suchas…
Connected tool to Scatter Diagram :- Correlation

17. Quality Journey by Nilesh Jajoo