Question Paper: Production Planning and Control : Question Paper Dec 2015 - Mechanical Engineering (Semester 7) | Mumbai University (MU)
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Production Planning and Control - Dec 2015

Mechanical Engineering (Semester 7)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS
(1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.


Answer any four:

1 (a) What are the different types of production?(5 marks) 1 (b) Discuss the prerequisites of PPC.(5 marks) 1 (c) Mention the reasons for storing the inventory.(5 marks) 1 (d) What problems are faced in case of lack product planning?(5 marks) 1 (e) What are the assumptions of job sequencing.(5 marks) 2 (a) What are the functions of PPC.(10 marks) 2 (b) What is Work Order? How is it prepared in different manufacturing units.(10 marks) 3 (a) A materials manager adopts the policy to place an order for a minimum quantity of 500 of a particular item in order to avail discount of 10%. It was found from the company records that for last year 8 orders were placed of size 200 nos, ordering cost is Rs. 500 per order Inventory carrying cost charges at 40% cost per unit Rs.400
i) Is the decision of manager Justified
ii) What is the effect of this decision on company.
(10 marks)


Write short notes on any two:

3 (b) (i) Two Bin system.(5 marks) 3 (b) (ii) MRPI & MRP-II(5 marks) 3 (b) (iii) Just in Time manufacturing system.(5 marks) 4 (a) Prepare the process sheet for the given component.
(10 marks)
4 (b) Demand (In thousands) for bearings of a company is given below. Forecast for the year 2009 was 75 Units.
i) Estimate the sales forecast for 2016 with least square method.
ii) Obtain the forecast of demand for the year 2016 by exponential smoothing method with α=0.5 and compare with earlier forecast.

Year 2009 2010 2011 2012 2013 2014 2015
Demand 77 88 94 85 91 98 90
(10 marks) 5 (a) Solve the following LLP
Maximize
Z=3 X1 + 2X2 + X3
Subject to
X1 + 2X2+X3 ≤ 430
3X1+2X3≤460
X1+4X2 ≤ 420
X1 + X2 X3 ≥0
(10 marks)
5 (b) What are the principle functions of Dispatching? What are the documents generally prepared while performing dispatching function?(10 marks) 6 (a) There are five jobs, each of which is to be processed through three machines A, B, C in the order ABC Processing time in hours are
Determine the optimum sequence for the five jobs and the minimum elapsed lime. Also calculate the waiting time for three machines.
JOBS A B C
1 3 4 7
2 8 5 9
3 7 1 5
4 5 2 6
5 4 3 10
(10 marks)
6 (b) For the activities given below the network diagram. Time estimates (in days) for each activity are also given. Determine.
i) Draw the network diagram and find the project duration.
ii) The probability of completing the project in 32 days.
Activity Optimistic Time Most Likely Time Pessimistic Time
1-2 6 9 18
1-3 5 8 17
2-4 4 7 22
3-4 4 7 16
4-5 4 10 22
2-5 4 7 10
3-5 2 5 8
(10 marks)

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