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DRIVE-Spring
2014
PROGRAM/SEMESTER-
MBADS (SEM 3/SEM 5) MBAFLEX/ MBAN2 (SEM 3)
PGDTQMN
(SEM 1)
QM0012 STATISTICAL PROCESS
CONTROL AND PROCESS CAPABILITY
Q1.
a.
Explain the concept of Statistical Process Control.
b.
Describe the procedure to construct Fish bone diagram with an example.
(Explanation
of SPC, Procedure to construct Fish bone diagram, Example)
Answer.
a)
Concept
of Statistical Process Control
Statistical process control is an
optimization philosophy concerned with continuous process
improvements, using a collection of (statistical) tools for:
·
data
and process analysis
·
making
inferences about process behaviour
·
decision
making
Q2.
Describe Deming’s Funnel experiment and Deming’s Red Bead experiment.
(Deming’s
Funnel experiment, Deming’s Red Bead experiment)
Answer.
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
Q3.
Differentiate between variable control charts and attribute control charts.
Explain with an example how to calculate p Chart and np Chart.
(Differences,
Calculation of p chart and np chart with an example)
Answer.
Variable
control charts and attribute control charts
Having understood the concept of
attribute data, let us know see some of the major difference between Control
charts for Variables and Control charts for attributes. The following Table
shows the difference:
Q4.
Explain Multivariate Control Charts and multivariate normal distribution.
(Explanation
of Multivariate Quality Control Charts, Explanation of Multivariate normal
distribution)
Multivariate
Quality Control Charts
A Multivariate Chart is
a control chart for variables data. Multivariate Charts are used to detect
shifts in the mean or the relationship (covariance) between several related
parameters.
Q5.
a. Explain the concept of Process Capability.
Give the Significance of Process Capability. Mention the major uses of Process
capability
b.
Explain the guidelines for using Acceptance Sampling.
(Concept
of Process Capability, Significance of Process Capability, Uses of process
capability, Guidelines for using Acceptance Sampling)
Answer.
a)
Concept
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 Process capability is a statistical analysis of
variation of the process
Q6.
Explain the methodology for Statistical Process Control (SPC) implementation.
What are the benefits derived from SPC implementation?
(Methodology
for SPC implementation, Benefits derived from SPC implementation)
Answer.
Methodology
for SPC implementation
The following proposed
methodology helps improve product consistency and implementation of SPC.
·
Review
Quality Management Systems
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