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Master
of Business Administration - MBA Semester 3
QM0012
- Statistical Process Control & Process Capability
(4
credits)
(Book
ID: B1242)
ASSIGNMENT-
Set 1
Marks
60
Note:
Each main Question carries 10 marks. Answer all the questions.
Q 1. Mention the seven basic Quality control
tools. Describe briefly the Cause and Effect
Diagram.
Answer :
The Seven Basic QC (Quality Control) Tools are a given set of graphical
techniques identified as being helpful in troubleshooting issues related to
quality[1]. These seven are called basic because they can be used easily by
anyone to solve the vast majority of quality-related issues. Many quality
professional believe these were originated by Dr. Ishikawa, a world renowned
quality professional. But, he would tell
you that he was inspired
Q2. Explain the following with examples:
a. Pareto chart
Answer : Also called: Pareto diagram,
Pareto analysis
Variations: weighted Pareto chart,
Q3. (a) What are the causes of variation in a
process?
Answer : Accuracy means getting a
result that is close to the real answer. Precision means getting similar result
every time you try. Think
(b) Differentiate between ‘accuracy’ and ‘precision’?
Answer : Accuracy
is defined as, "The ability of a measurement to match the actual value of
the quantity being measured". If in reality it is 34.0 F outside and a
temperature sensor reads 34.0 F, then than sensor is accurate.
Precision
is defined as, "(1) The ability of a measurement to be consistently reproduced"
and "(2) The number of significant digits to which a value has been
reliably measured". If on several tests the temperature sensor matches the
4. What is Normal distribution? What are the
properties of Normal distribution?
Answer : : The Normal Distribution(Bell Curve)In many natural processes,
random variation conforms to a particular probability distribution known as the
normal distribution, which is the most commonly observed probability
Q5. What is a Control chart? Describe the
structure and construction of control chart.
Answer
: Introduction
In this section, you will learn
about constructing Time-between charts and interpreting the findings. We
focus on constructing a control chart for your diet and exercise patterns,
though other applications are also possible and you will see examples of application
of control charts to family drug court data or asthma care at end of this
section. An important application of Time-between charts is time to
dissatisfied customer,
Q 6. Using data relating to 5 samples of 4
items each, calculate the control limits. Use X-bar & R
chart.
Samples X1 X2 X3 X4 X5
Items 1 47 32 44 35 20 2 19 37 31 25 34 3 29
11 16 11 444 28 29 42 59 38
Master
of Business Administration - MBA Semester 3
QM0012
- Statistical Process Control & Process Capability
(4
credits)
(Book
ID: B1242)
ASSIGNMENT-
Set 2
Marks
60
Note: Each main Question carries 10 marks.
Answer all the questions.
Q 1. Describe briefly the Cause and Effect
Diagram with example.
Answer : When you have a serious
problem, it's important to explore all of the things that could cause it,
before you start to think about a solution.
That way you can solve the problem
completely, first time round, rather than just addressing part of it and having
the problem run on and on
2. (a) What is the meaning of a ‘process’?
Explain with an example.
(b)
Write a brief note on SIPOC.
Answer : A SIPOC diagram is a type of
process map typically used in Lean Six Sigma projects to identify the primary
elements of a process. It provides a macro view that brings together Suppliers,
Inputs, Process, Outputs, and Customers. This article provides a simple and
effective method for building a SIPOC with your team.
·
Preparation. Gather all of your supplies and
make sure you have ample space for the team to work. Hang your paper on the
wall
Q3.
Differentiate between process capability and process stability. Mention some of
the major
uses of process capability analysis.
Answer : Nothing and everything. Though they are not directly linked,
statistician and SPC expert Steven Watches cautions that without evidence of
process stability, capability data is useless.
Process Stability and Process
Capability are both extremely important aspects of any manufacturing process.
Often the concepts
Q4. What is meant by acceptance sampling?
Explain the various quality indices for acceptance
sampling plan.
Answer : Advantages of sampling
1. The items which are subjected to
destructive test must be inspected by sampling inspection only.2. The cost and time
required for sampling inspection is quite less as compared to 100%inspection.3.
Problem of inspection fatigue which occurs in 100% inspection is eliminated.4.
Smaller inspection staff is necessary.
5. (a)
Define process capability index.
Answer :In the Six Sigma quality methodology,
process performance is reported to the organization as a sigma level. The
higher the sigma level, the better the process is performing.
Another way
to report process capability and process performance is through the statistical
measurements of Cp, Cap, Pp, and Pap. This article will present definitions,
interpretations and calculations for Cap and Pap though
(b)
Differentiate between Cp and Cpk index.
Answer
: Differences
Between Cap and Pap
“Cap is for short term, Pap is for long term.” Sun deep Singh
“Pap produces an index number (like 1.33) for the
process variation. Cap references
the variation to your specification limits. If you just want to know how much
variation the process exhibits, a Pap measurement
is fine. If you
6. The
following numbers indicates the number of defectives in 20 samples containing
2000
items:
356, 402, 216, 264, 425, 430, 216, 341, 225,
322, 280, 306, 337, 305, 126, 409, 280, 389,
326, 193
Calculate the values for central line and
control limits for P chart and construct the control
chart.
Answer :
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call us at :- 08263069601
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