GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-VII (NEW) EXAMINATION - WINTER 2020
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Subject Code:2171504 Date:30/01/2021Subject Name:Industrial Statistics & Quality Management
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
- Attempt any FOUR questions out of EIGHT questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) Define Quality. State its importance for any industry. 03
(b) What is the importance of SQC? 04
(c) Discuss the role of any industrial engineer in SQC. 07
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Q.2 (a) What is SQC. 03
(b) Write note: Remedies of various causes of variations in process. 04
(c) What are seven tools of SQC? Explain Bar chart with example. 07
Q.3 (a) What is the importance of control charts ? 03
(b) Write note: C-chart. 04
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(c) Draw control chart for the following data: 07 Sample no. observations( diameter of shaft(mm))( five):
1 42 65 75 78 87
2 42 45 68 72 90
3 1924 80 81 81
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4 3654 69 59 785 174 75 78 60
6 0 60 39 59 79
7 1530 39 62 84
8 6178 94 109 136
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Q.4 (a) What is an OC curve? 03
(b) WRITE NOTE: C- chart and its application 04
(c) The total annual fertilizer consumption in thousands of tones during 07
2012-2018 in SBP LMT, MORBI was recorded as given in the table below.
Year Consumption
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2012 702013 76
2014 80
2015 68
2016 70
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2017 752018 80
(i) Fit a straight line trend by the method of least squares and compute the trend quantities.
(ii) What has been the annual increase in fertilizer consumption?
Q.5 (a) What is process variability? 03
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(b) Why sampling plan is to be designed? Explain 04age 42. If actuarial studies show the probability of any 42-year-old man dying in a given year to be 0.001, find the the probability that the company will have to pay 4 claims in a given year (.can be approximated by the Poisson distribution.)
Q.6 (a) What is process capability? 03
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(b) Write note: ISO:9000 and its importance 04(c) What is the standard normal (z) distribution? 07
The weights of packages of ground beef are normally distributed with mean 1 pound and standard deviation .10. What is the probability that a randomly selected package weighs between 0.80 and 0.85 pounds?
Q.7 (a) What is core relation? 03
(b) Write note: TQM 04
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(c) Explain Poisson distribution with its properties. 07 Q.8 (a) Why T- test is carried out? 03
(b) Write note: Quality circle in education institute. 04
(c) Explain Bayes rules of probability. 07
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