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DRIVE SUMMER 2014
PROGRAM/SEMESTER
MBADS (SEM 3/SEM 5) MBAFLEX/ MBAN2 (SEM 3) PGDTQMN (SEM 1)
SUBJECT
CODE & NAME QM0012 STATISTICAL PROCESS CONTROL AND PROCESS CAPABILITY
Q.1 Explain the concept of Cause and Effect Diagram, Check Sheet and
Scatter Diagram.
Explanation
of Cause and effect diagram
Explanation
of Check Sheet
Explanation
of Scatter Diagram
ANS:
Explanation of Cause and effect diagram:
Cause and Effect
Diagram, also called as “fish bone diagram” or “Ishikawa diagram”, shows
relationships between events and is a useful analysis in generating ideas and
in identifying the root cause of problem. It the cause and effect diagram is
used to explore all the potential or real causes (or inputs) that result in a
single effect (or output).Causes
Q.2
Describe
Deming’s Funnel experiment and Red Bead Experiment.
Deming’s
Funnel experiment
Deming’s
Red Bead experiment
ANS:
Deming’s Funnel experiment:
W. Edwards Deming has
stated, “If someone adjusts a stable process (one exhibiting common causes of
variation) to try to compensate for a result that is undesirable, or for a
result that is extra good, the output that follows will be worse than if he had
left the process alone”. This is called over control of the process or
“tampering”. If management
Q.3 Write short notes on
a) Binomial Distribution
b) Normal Distribution
ANS:
Explanation of Binomial distribution with an
example:
When a Bernoulli
experiment is repeated for “n” number of times, then it is called a binomial
process. Binomial distribution is a discrete probability distribution. Its
probability mass function is given by:
Q.4.What is analysis of variance? Explain the procedure for carrying
out Two way analysis of Variance with an example.
Meaning
of analysis of variance
Procedure
for carrying out two way analysis of variance with an example
ANS:
Meaning of analysis of variance:
The Analysis of
Variance is one of the most powerful statistical techniques. It is a
statistical test for heterogeneity of means by analysis of group variances. The
analysis of variance technique, developed by R.A. Fisher in 1920s, is
Q.5 Discuss the types of control charts. Explain with an example how to
calculate p Chart and np Chart.
Concept
of Control charts
Control
charts for variables
Control
charts for attributes
Calculation
of p chart and np chart with an example
ANS:
Concept of Control charts:
A control chart is a
graphical representation of the collected information. The information may
pertain to measured quality characteristics or judged quality characteristics
of samples. It detects the variation in processing and warns if there is any
departure from the specified tolerance limits. The control limits on the chart
are so placed as to disclose
Q.6 Explain the concept of Process Capability. Distinguish between
Process Stability and Capability. Mention the major uses of Process Capability.
Explanation
of Process Capability
Differences
between Process Stability and Capability
Uses
of Process Capability
ANS:
Explanation of Process Capability:
A process capability
study is performed for two primary reasons:
1. To predict future
capability of the process to produce product within specification
2. To identify process
improvement opportunities
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