SlideShare una empresa de Scribd logo
1 de 7
Quality management gurus
In this file, you can ref useful information about quality management gurus such as quality
management gurusforms, tools for quality management gurus, quality management
gurusstrategies … If you need more assistant for quality management gurus, please leave your
comment at the end of file.
Other useful material for quality management gurus:
• qualitymanagement123.com/23-free-ebooks-for-quality-management
• qualitymanagement123.com/185-free-quality-management-forms
• qualitymanagement123.com/free-98-ISO-9001-templates-and-forms
• qualitymanagement123.com/top-84-quality-management-KPIs
• qualitymanagement123.com/top-18-quality-management-job-descriptions
• qualitymanagement123.com/86-quality-management-interview-questions-and-answers
I. Contents of quality management gurus
==================
What is a quality guru? A guru, by definition, is a good person, a wise person and a teacher. A
quality guru should be all of these, plus have a concept and approach to quality within business
that has made a major and lasting impact. The gurus mentioned in this section have done, and
continue to do, that, in some cases, even after their death. The gurus There have been three
groups of gurus since the 1940’s: Early 1950’s Americans who took the messages of quality to
Japan Late 1950’s Japanese who developed new concepts in response to the Americans 1970’s-
1980’s Western gurus who followed the Japanese industrial success It is beyond the scope of this
site to go into great detail on each of the gurus, their philosophies, teachings and tools; however,
a brief overview of their contribution to the quality journey is given, supported by several
references. The Americans who went to Japan: W Edwards Deming placed great importance and
responsibility on management, at both the individual and company level, believing management
to be responsible for 94% of quality problems. His fourteen point plan is a complete philosophy
of management, that can be applied to small or large organisations in the public, private or
service sectors:
• Create constancy of purpose towards improvement of product and service
• Adopt the new philosophy. We can no longer live with commonly accepted levels of delay,
mistakes and defective workmanship
• Cease dependence on mass inspection. Instead, require statistical evidence that quality is built
in
• End the practice of awarding business on the basis of price
• Find problems. It is management’s job to work continually on the system
• Institute modern methods of training on the job
• Institute modern methods of supervision of production workers, The responsibility of foremen
must be changed from numbers to quality
• Drive out fear, so that everyone may work effectively for the company
• Break down barriers between departments
• Eliminate numerical goals, posters and slogans for the workforce asking for new levels of
productivity without providing methods
• Eliminate work standards that prescribe numerical quotas
• Remove barriers that stand between the hourly worker and their right to pride of workmanship
• Institute a vigorous programme of education and retraining
• Create a structure in top management that will push on the above points every day
==================
III. Quality management tools
1. Check sheet
The check sheet is a form (document) used to collect data
in real time at the location where the data is generated.
The data it captures can be quantitative or qualitative.
When the information is quantitative, the check sheet is
sometimes called a tally sheet.
The defining characteristic of a check sheet is that data
are recorded by making marks ("checks") on it. A typical
check sheet is divided into regions, and marks made in
different regions have different significance. Data are
read by observing the location and number of marks on
the sheet.
Check sheets typically employ a heading that answers the
Five Ws:
 Who filled out the check sheet
 What was collected (what each check represents,
an identifying batch or lot number)
 Where the collection took place (facility, room,
apparatus)
 When the collection took place (hour, shift, day
of the week)
 Why the data were collected
2. Control chart
Control charts, also known as Shewhart charts
(after Walter A. Shewhart) or process-behavior
charts, in statistical process control are tools used
to determine if a manufacturing or business
process is in a state of statistical control.
If analysis of the control chart indicates that the
process is currently under control (i.e., is stable,
with variation only coming from sources common
to the process), then no corrections or changes to
process control parameters are needed or desired.
In addition, data from the process can be used to
predict the future performance of the process. If
the chart indicates that the monitored process is
not in control, analysis of the chart can help
determine the sources of variation, as this will
result in degraded process performance.[1] A
process that is stable but operating outside of
desired (specification) limits (e.g., scrap rates
may be in statistical control but above desired
limits) needs to be improved through a deliberate
effort to understand the causes of current
performance and fundamentally improve the
process.
The control chart is one of the seven basic tools of
quality control.[3] Typically control charts are
used for time-series data, though they can be used
for data that have logical comparability (i.e. you
want to compare samples that were taken all at
the same time, or the performance of different
individuals), however the type of chart used to do
this requires consideration.
3. Pareto chart
A Pareto chart, named after Vilfredo Pareto, is a type
of chart that contains both bars and a line graph, where
individual values are represented in descending order
by bars, and the cumulative total is represented by the
line.
The left vertical axis is the frequency of occurrence,
but it can alternatively represent cost or another
important unit of measure. The right vertical axis is
the cumulative percentage of the total number of
occurrences, total cost, or total of the particular unit of
measure. Because the reasons are in decreasing order,
the cumulative function is a concave function. To take
the example above, in order to lower the amount of
late arrivals by 78%, it is sufficient to solve the first
three issues.
The purpose of the Pareto chart is to highlight the
most important among a (typically large) set of
factors. In quality control, it often represents the most
common sources of defects, the highest occurring type
of defect, or the most frequent reasons for customer
complaints, and so on. Wilkinson (2006) devised an
algorithm for producing statistically based acceptance
limits (similar to confidence intervals) for each bar in
the Pareto chart.
4. Scatter plot Method
A scatter plot, scatterplot, or scattergraph is a type of
mathematical diagram using Cartesian coordinates to
display values for two variables for a set of data.
The data is displayed as a collection of points, each
having the value of one variable determining the position
on the horizontal axis and the value of the other variable
determining the position on the vertical axis.[2] This kind
of plot is also called a scatter chart, scattergram, scatter
diagram,[3] or scatter graph.
A scatter plot is used when a variable exists that is under
the control of the experimenter. If a parameter exists that
is systematically incremented and/or decremented by the
other, it is called the control parameter or independent
variable and is customarily plotted along the horizontal
axis. The measured or dependent variable is customarily
plotted along the vertical axis. If no dependent variable
exists, either type of variable can be plotted on either axis
and a scatter plot will illustrate only the degree of
correlation (not causation) between two variables.
A scatter plot can suggest various kinds of correlations
between variables with a certain confidence interval. For
example, weight and height, weight would be on x axis
and height would be on the y axis. Correlations may be
positive (rising), negative (falling), or null (uncorrelated).
If the pattern of dots slopes from lower left to upper right,
it suggests a positive correlation between the variables
being studied. If the pattern of dots slopes from upper left
to lower right, it suggests a negative correlation. A line of
best fit (alternatively called 'trendline') can be drawn in
order to study the correlation between the variables. An
equation for the correlation between the variables can be
determined by established best-fit procedures. For a linear
correlation, the best-fit procedure is known as linear
regression and is guaranteed to generate a correct solution
in a finite time. No universal best-fit procedure is
guaranteed to generate a correct solution for arbitrary
relationships. A scatter plot is also very useful when we
wish to see how two comparable data sets agree with each
other. In this case, an identity line, i.e., a y=x line, or an
1:1 line, is often drawn as a reference. The more the two
data sets agree, the more the scatters tend to concentrate in
the vicinity of the identity line; if the two data sets are
numerically identical, the scatters fall on the identity line
exactly.
5.Ishikawa diagram
Ishikawa diagrams (also called fishbone diagrams,
herringbone diagrams, cause-and-effect diagrams, or
Fishikawa) are causal diagrams created by Kaoru
Ishikawa (1968) that show the causes of a specific
event.[1][2] Common uses of the Ishikawa diagram are
product design and quality defect prevention, to identify
potential factors causing an overall effect. Each cause or
reason for imperfection is a source of variation. Causes
are usually grouped into major categories to identify these
sources of variation. The categories typically include
 People: Anyone involved with the process
 Methods: How the process is performed and the
specific requirements for doing it, such as policies,
procedures, rules, regulations and laws
 Machines: Any equipment, computers, tools, etc.
required to accomplish the job
 Materials: Raw materials, parts, pens, paper, etc.
used to produce the final product
 Measurements: Data generated from the process
that are used to evaluate its quality
 Environment: The conditions, such as location,
time, temperature, and culture in which the process
operates
6. Histogram method
A histogram is a graphical representation of the
distribution of data. It is an estimate of the probability
distribution of a continuous variable (quantitative
variable) and was first introduced by Karl Pearson.[1] To
construct a histogram, the first step is to "bin" the range of
values -- that is, divide the entire range of values into a
series of small intervals -- and then count how many
values fall into each interval. A rectangle is drawn with
height proportional to the count and width equal to the bin
size, so that rectangles abut each other. A histogram may
also be normalized displaying relative frequencies. It then
shows the proportion of cases that fall into each of several
categories, with the sum of the heights equaling 1. The
bins are usually specified as consecutive, non-overlapping
intervals of a variable. The bins (intervals) must be
adjacent, and usually equal size.[2] The rectangles of a
histogram are drawn so that they touch each other to
indicate that the original variable is continuous.[3]
III. Other topics related to Quality management gurus (pdf download)
quality management systems
quality management courses
quality management tools
iso 9001 quality management system
quality management process
quality management system example
quality system management
quality management techniques
quality management standards
quality management policy
quality management strategy
quality management books

Más contenido relacionado

La actualidad más candente

Quality management system objectives
Quality management system objectivesQuality management system objectives
Quality management system objectivesselinasimpson361
 
Quality management system diagram
Quality management system diagramQuality management system diagram
Quality management system diagramselinasimpson371
 
The importance of quality management
The importance of quality managementThe importance of quality management
The importance of quality managementselinasimpson1501
 
Quality assurance and management
Quality assurance and managementQuality assurance and management
Quality assurance and managementselinasimpson2301
 
Quality management system flowchart
Quality management system flowchartQuality management system flowchart
Quality management system flowchartselinasimpson2801
 
Career in quality management
Career in quality managementCareer in quality management
Career in quality managementselinasimpson341
 
Quality management conference
Quality management conferenceQuality management conference
Quality management conferenceselinasimpson311
 
Objectives of quality management
Objectives of quality managementObjectives of quality management
Objectives of quality managementselinasimpson1701
 
Iso 9001 certification consultants
Iso 9001 certification consultantsIso 9001 certification consultants
Iso 9001 certification consultantsjintrajom
 
European foundation for quality management
European foundation for quality managementEuropean foundation for quality management
European foundation for quality managementselinasimpson0201
 
European foundation of quality management
European foundation of quality managementEuropean foundation of quality management
European foundation of quality managementselinasimpson1601
 
Functions of quality management
Functions of quality managementFunctions of quality management
Functions of quality managementselinasimpson2901
 
Quality management consultancy
Quality management consultancyQuality management consultancy
Quality management consultancyselinasimpson2801
 

La actualidad más candente (20)

Quality management system objectives
Quality management system objectivesQuality management system objectives
Quality management system objectives
 
Quality management careers
Quality management careersQuality management careers
Quality management careers
 
Quality management system diagram
Quality management system diagramQuality management system diagram
Quality management system diagram
 
Quality management quiz
Quality management quizQuality management quiz
Quality management quiz
 
The importance of quality management
The importance of quality managementThe importance of quality management
The importance of quality management
 
Quality assurance and management
Quality assurance and managementQuality assurance and management
Quality assurance and management
 
Quality management plans
Quality management plansQuality management plans
Quality management plans
 
Diploma quality management
Diploma quality managementDiploma quality management
Diploma quality management
 
Quality management system flowchart
Quality management system flowchartQuality management system flowchart
Quality management system flowchart
 
Quality management planning
Quality management planningQuality management planning
Quality management planning
 
Career in quality management
Career in quality managementCareer in quality management
Career in quality management
 
Quality management conference
Quality management conferenceQuality management conference
Quality management conference
 
Business quality management
Business quality managementBusiness quality management
Business quality management
 
Objectives of quality management
Objectives of quality managementObjectives of quality management
Objectives of quality management
 
Quality management seminars
Quality management seminarsQuality management seminars
Quality management seminars
 
Iso 9001 certification consultants
Iso 9001 certification consultantsIso 9001 certification consultants
Iso 9001 certification consultants
 
European foundation for quality management
European foundation for quality managementEuropean foundation for quality management
European foundation for quality management
 
European foundation of quality management
European foundation of quality managementEuropean foundation of quality management
European foundation of quality management
 
Functions of quality management
Functions of quality managementFunctions of quality management
Functions of quality management
 
Quality management consultancy
Quality management consultancyQuality management consultancy
Quality management consultancy
 

Similar a Quality management gurus

Evolution of quality management
Evolution of quality managementEvolution of quality management
Evolution of quality managementselinasimpson0401
 
Quality management qualification
Quality management qualificationQuality management qualification
Quality management qualificationselinasimpson3001
 
Quality management qualifications
Quality management qualificationsQuality management qualifications
Quality management qualificationsselinasimpson1901
 
Quality management dashboard
Quality management dashboardQuality management dashboard
Quality management dashboardselinasimpson2901
 
Quality management system planning
Quality management system planningQuality management system planning
Quality management system planningselinasimpson1601
 
Certified quality management system
Certified quality management systemCertified quality management system
Certified quality management systemselinasimpson1701
 
What is quality management systems
What is quality management systemsWhat is quality management systems
What is quality management systemsselinasimpson331
 
Model of a process based quality management system
Model of a process based quality management systemModel of a process based quality management system
Model of a process based quality management systemselinasimpson1501
 
Integrated quality management
Integrated quality managementIntegrated quality management
Integrated quality managementselinasimpson2401
 
Components of quality management
Components of quality managementComponents of quality management
Components of quality managementselinasimpson1901
 
Process based quality management system
Process based quality management systemProcess based quality management system
Process based quality management systemselinasimpson2801
 
Quality and operations management
Quality and operations managementQuality and operations management
Quality and operations managementselinasimpson1901
 
Quality management presentation
Quality management presentationQuality management presentation
Quality management presentationselinasimpson1501
 

Similar a Quality management gurus (20)

Evolution of quality management
Evolution of quality managementEvolution of quality management
Evolution of quality management
 
Quality management qualification
Quality management qualificationQuality management qualification
Quality management qualification
 
Quality management qualifications
Quality management qualificationsQuality management qualifications
Quality management qualifications
 
What is quality management
What is quality managementWhat is quality management
What is quality management
 
Quality management dashboard
Quality management dashboardQuality management dashboard
Quality management dashboard
 
Quality management masters
Quality management mastersQuality management masters
Quality management masters
 
Quality management system planning
Quality management system planningQuality management system planning
Quality management system planning
 
Certified quality management system
Certified quality management systemCertified quality management system
Certified quality management system
 
What is quality management systems
What is quality management systemsWhat is quality management systems
What is quality management systems
 
Model of a process based quality management system
Model of a process based quality management systemModel of a process based quality management system
Model of a process based quality management system
 
Management quality
Management qualityManagement quality
Management quality
 
Integrated quality management
Integrated quality managementIntegrated quality management
Integrated quality management
 
Components of quality management
Components of quality managementComponents of quality management
Components of quality management
 
Process based quality management system
Process based quality management systemProcess based quality management system
Process based quality management system
 
Tools of quality management
Tools of quality managementTools of quality management
Tools of quality management
 
Quality and operations management
Quality and operations managementQuality and operations management
Quality and operations management
 
Customer quality management
Customer quality managementCustomer quality management
Customer quality management
 
Quality management presentation
Quality management presentationQuality management presentation
Quality management presentation
 
Quality management course
Quality management courseQuality management course
Quality management course
 
Quality management training
Quality management trainingQuality management training
Quality management training
 

Más de selinasimpson1001

Quality planning in project management
Quality planning in project managementQuality planning in project management
Quality planning in project managementselinasimpson1001
 
Quality management specialist
Quality management specialistQuality management specialist
Quality management specialistselinasimpson1001
 
Project quality management definition
Project quality management definitionProject quality management definition
Project quality management definitionselinasimpson1001
 
Project management quality assurance
Project management quality assuranceProject management quality assurance
Project management quality assuranceselinasimpson1001
 
Laboratory quality management
Laboratory quality managementLaboratory quality management
Laboratory quality managementselinasimpson1001
 
Implementing a quality management system
Implementing a quality management systemImplementing a quality management system
Implementing a quality management systemselinasimpson1001
 
Concept of quality management
Concept of quality managementConcept of quality management
Concept of quality managementselinasimpson1001
 

Más de selinasimpson1001 (12)

Quality planning in project management
Quality planning in project managementQuality planning in project management
Quality planning in project management
 
Quality management winnipeg
Quality management winnipegQuality management winnipeg
Quality management winnipeg
 
Quality management specialist
Quality management specialistQuality management specialist
Quality management specialist
 
Quality management articles
Quality management articlesQuality management articles
Quality management articles
 
Project quality management definition
Project quality management definitionProject quality management definition
Project quality management definition
 
Project management quality assurance
Project management quality assuranceProject management quality assurance
Project management quality assurance
 
Modern quality management
Modern quality managementModern quality management
Modern quality management
 
Management and quality
Management and qualityManagement and quality
Management and quality
 
Lean quality management
Lean quality managementLean quality management
Lean quality management
 
Laboratory quality management
Laboratory quality managementLaboratory quality management
Laboratory quality management
 
Implementing a quality management system
Implementing a quality management systemImplementing a quality management system
Implementing a quality management system
 
Concept of quality management
Concept of quality managementConcept of quality management
Concept of quality management
 

Quality management gurus

  • 1. Quality management gurus In this file, you can ref useful information about quality management gurus such as quality management gurusforms, tools for quality management gurus, quality management gurusstrategies … If you need more assistant for quality management gurus, please leave your comment at the end of file. Other useful material for quality management gurus: • qualitymanagement123.com/23-free-ebooks-for-quality-management • qualitymanagement123.com/185-free-quality-management-forms • qualitymanagement123.com/free-98-ISO-9001-templates-and-forms • qualitymanagement123.com/top-84-quality-management-KPIs • qualitymanagement123.com/top-18-quality-management-job-descriptions • qualitymanagement123.com/86-quality-management-interview-questions-and-answers I. Contents of quality management gurus ================== What is a quality guru? A guru, by definition, is a good person, a wise person and a teacher. A quality guru should be all of these, plus have a concept and approach to quality within business that has made a major and lasting impact. The gurus mentioned in this section have done, and continue to do, that, in some cases, even after their death. The gurus There have been three groups of gurus since the 1940’s: Early 1950’s Americans who took the messages of quality to Japan Late 1950’s Japanese who developed new concepts in response to the Americans 1970’s- 1980’s Western gurus who followed the Japanese industrial success It is beyond the scope of this site to go into great detail on each of the gurus, their philosophies, teachings and tools; however, a brief overview of their contribution to the quality journey is given, supported by several references. The Americans who went to Japan: W Edwards Deming placed great importance and responsibility on management, at both the individual and company level, believing management to be responsible for 94% of quality problems. His fourteen point plan is a complete philosophy of management, that can be applied to small or large organisations in the public, private or service sectors: • Create constancy of purpose towards improvement of product and service • Adopt the new philosophy. We can no longer live with commonly accepted levels of delay, mistakes and defective workmanship • Cease dependence on mass inspection. Instead, require statistical evidence that quality is built in • End the practice of awarding business on the basis of price • Find problems. It is management’s job to work continually on the system • Institute modern methods of training on the job • Institute modern methods of supervision of production workers, The responsibility of foremen must be changed from numbers to quality
  • 2. • Drive out fear, so that everyone may work effectively for the company • Break down barriers between departments • Eliminate numerical goals, posters and slogans for the workforce asking for new levels of productivity without providing methods • Eliminate work standards that prescribe numerical quotas • Remove barriers that stand between the hourly worker and their right to pride of workmanship • Institute a vigorous programme of education and retraining • Create a structure in top management that will push on the above points every day ================== III. Quality management tools 1. Check sheet The check sheet is a form (document) used to collect data in real time at the location where the data is generated. The data it captures can be quantitative or qualitative. When the information is quantitative, the check sheet is sometimes called a tally sheet. The defining characteristic of a check sheet is that data are recorded by making marks ("checks") on it. A typical check sheet is divided into regions, and marks made in different regions have different significance. Data are read by observing the location and number of marks on the sheet. Check sheets typically employ a heading that answers the Five Ws:  Who filled out the check sheet  What was collected (what each check represents, an identifying batch or lot number)  Where the collection took place (facility, room, apparatus)  When the collection took place (hour, shift, day of the week)  Why the data were collected 2. Control chart
  • 3. Control charts, also known as Shewhart charts (after Walter A. Shewhart) or process-behavior charts, in statistical process control are tools used to determine if a manufacturing or business process is in a state of statistical control. If analysis of the control chart indicates that the process is currently under control (i.e., is stable, with variation only coming from sources common to the process), then no corrections or changes to process control parameters are needed or desired. In addition, data from the process can be used to predict the future performance of the process. If the chart indicates that the monitored process is not in control, analysis of the chart can help determine the sources of variation, as this will result in degraded process performance.[1] A process that is stable but operating outside of desired (specification) limits (e.g., scrap rates may be in statistical control but above desired limits) needs to be improved through a deliberate effort to understand the causes of current performance and fundamentally improve the process. The control chart is one of the seven basic tools of quality control.[3] Typically control charts are used for time-series data, though they can be used for data that have logical comparability (i.e. you want to compare samples that were taken all at the same time, or the performance of different individuals), however the type of chart used to do this requires consideration. 3. Pareto chart
  • 4. A Pareto chart, named after Vilfredo Pareto, is a type of chart that contains both bars and a line graph, where individual values are represented in descending order by bars, and the cumulative total is represented by the line. The left vertical axis is the frequency of occurrence, but it can alternatively represent cost or another important unit of measure. The right vertical axis is the cumulative percentage of the total number of occurrences, total cost, or total of the particular unit of measure. Because the reasons are in decreasing order, the cumulative function is a concave function. To take the example above, in order to lower the amount of late arrivals by 78%, it is sufficient to solve the first three issues. The purpose of the Pareto chart is to highlight the most important among a (typically large) set of factors. In quality control, it often represents the most common sources of defects, the highest occurring type of defect, or the most frequent reasons for customer complaints, and so on. Wilkinson (2006) devised an algorithm for producing statistically based acceptance limits (similar to confidence intervals) for each bar in the Pareto chart. 4. Scatter plot Method A scatter plot, scatterplot, or scattergraph is a type of mathematical diagram using Cartesian coordinates to display values for two variables for a set of data. The data is displayed as a collection of points, each having the value of one variable determining the position on the horizontal axis and the value of the other variable determining the position on the vertical axis.[2] This kind of plot is also called a scatter chart, scattergram, scatter diagram,[3] or scatter graph. A scatter plot is used when a variable exists that is under the control of the experimenter. If a parameter exists that
  • 5. is systematically incremented and/or decremented by the other, it is called the control parameter or independent variable and is customarily plotted along the horizontal axis. The measured or dependent variable is customarily plotted along the vertical axis. If no dependent variable exists, either type of variable can be plotted on either axis and a scatter plot will illustrate only the degree of correlation (not causation) between two variables. A scatter plot can suggest various kinds of correlations between variables with a certain confidence interval. For example, weight and height, weight would be on x axis and height would be on the y axis. Correlations may be positive (rising), negative (falling), or null (uncorrelated). If the pattern of dots slopes from lower left to upper right, it suggests a positive correlation between the variables being studied. If the pattern of dots slopes from upper left to lower right, it suggests a negative correlation. A line of best fit (alternatively called 'trendline') can be drawn in order to study the correlation between the variables. An equation for the correlation between the variables can be determined by established best-fit procedures. For a linear correlation, the best-fit procedure is known as linear regression and is guaranteed to generate a correct solution in a finite time. No universal best-fit procedure is guaranteed to generate a correct solution for arbitrary relationships. A scatter plot is also very useful when we wish to see how two comparable data sets agree with each other. In this case, an identity line, i.e., a y=x line, or an 1:1 line, is often drawn as a reference. The more the two data sets agree, the more the scatters tend to concentrate in the vicinity of the identity line; if the two data sets are numerically identical, the scatters fall on the identity line exactly.
  • 6. 5.Ishikawa diagram Ishikawa diagrams (also called fishbone diagrams, herringbone diagrams, cause-and-effect diagrams, or Fishikawa) are causal diagrams created by Kaoru Ishikawa (1968) that show the causes of a specific event.[1][2] Common uses of the Ishikawa diagram are product design and quality defect prevention, to identify potential factors causing an overall effect. Each cause or reason for imperfection is a source of variation. Causes are usually grouped into major categories to identify these sources of variation. The categories typically include  People: Anyone involved with the process  Methods: How the process is performed and the specific requirements for doing it, such as policies, procedures, rules, regulations and laws  Machines: Any equipment, computers, tools, etc. required to accomplish the job  Materials: Raw materials, parts, pens, paper, etc. used to produce the final product  Measurements: Data generated from the process that are used to evaluate its quality  Environment: The conditions, such as location, time, temperature, and culture in which the process operates 6. Histogram method
  • 7. A histogram is a graphical representation of the distribution of data. It is an estimate of the probability distribution of a continuous variable (quantitative variable) and was first introduced by Karl Pearson.[1] To construct a histogram, the first step is to "bin" the range of values -- that is, divide the entire range of values into a series of small intervals -- and then count how many values fall into each interval. A rectangle is drawn with height proportional to the count and width equal to the bin size, so that rectangles abut each other. A histogram may also be normalized displaying relative frequencies. It then shows the proportion of cases that fall into each of several categories, with the sum of the heights equaling 1. The bins are usually specified as consecutive, non-overlapping intervals of a variable. The bins (intervals) must be adjacent, and usually equal size.[2] The rectangles of a histogram are drawn so that they touch each other to indicate that the original variable is continuous.[3] III. Other topics related to Quality management gurus (pdf download) quality management systems quality management courses quality management tools iso 9001 quality management system quality management process quality management system example quality system management quality management techniques quality management standards quality management policy quality management strategy quality management books