An well escorted ppt on control charts relating to operational management from BBA

1. Control Charts
Group Members:-
Sneha Dasouni (201810702110034)
Sonali Sharma (201810702110035)
Shikhar Mehrotra (201810702110036)
Abhay Agrahari (201810702110037
Course:- BBA
Year/ Semester:- 2nd / 3rd
Subject:- Operations Management

2. INDEX
• What is a Control Chart ?
• What do these charts do ?
• Its advantages and purposes.
• Types of Control Charts.
• Comparison of Variable and Attribute Charts.
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3. What is a Control Chart ?
• Graphical representation of
the collected information.
• Pertains to the measured
quality characteristics.
• Graph used to study how a
process changes over time.
• Data are plotted in time order.
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4. What do these Charts Do ?
• Detects variations in the
production process .
• Warns if there is any deviation
from the specified tolerance
limits.
• Primarily a diagnostic technique.
• Depicts if there is any change on
the characteristics of items since
the start of the production.
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5. Advantages of Control Charts
• It indicates whether a process
is in control or out of control.
• It ensures product quality
level.
• It warns rectification in time
and scrap percentage can be
reduced.
• It provides information about
the selection of process.
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6. Types of Control Charts 5

7. Variable Charts
• Used to evaluate variation in a
process where the measurement is
a variable.
• Variable measurement means
the variable can be measured on a
continuous scale (e.g. height,
weight, length, concentration).
• The two main types of variable
charts are:- (i) X- bar (ii) R- bar
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9. Attribute Charts
• Used to evaluate variation where the
measurement is an attribute.
• These charts come into picture where
the colour , number of spots etc. are to
be considered.
• There are two types of Attribute
charts:-
(i) Binomial distribution (e.g. p, np-
chart)
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11. Variable and Attribute Charts
(Comparison)
• Variable charts involve the measurement of the job dimensions
whereas an attribute chart only differentiates between a
defective item and a non-defective item.
• Variable charts are more detailed and contain more information
as compared to attribute charts.
• Attribute charts is based on ‘GO and NO GO’ data but variable
chart also rectifies the problem.
• Variables charts are expensive in comparison to attribute
charts.
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