MS-5 june-2008
MS-5 : MANAGEMENT OF MACHINES AND MATERIALS
1,(a) Explain the Management Systems concept with the help of an exarnple. what are the major distinctions between a production organisation and a service organisation ?
(b) Product A consists of three B type sub-assemblies and one C type sub-assembly. The sub-assembly B consists of one D sub-assembly, one E sub-assembly, and one F sub-assembly. The sub-assembly E consists of a D and a K. The sub-assembly C consists of a G and an F.
(i) Prepare a product tree.
(ii) Prepare the Bill of Materials.
iii)Determine the number of each sub-assembly/components required to prepaffe fifty units of item A.
2. a) Discuss briefly with suitable examples, each of the following :
(i) a long-range capacity decision
(ii) an intermediate-range capacity decision
(iii) a short-range capacity decision
b) A small firm intends to increase the capacity of a bottleneck operation by adding a new machine. Two alternatives A and B have been identified, and the
associated costs and revenues have been estimated. Annual fixed costs would be Rs. 40,000 for A, and Rs. 30,000 for B; variable costs per unit would be Rs. 10 for A and Rs. L2 for B; and revenu e per unit would be Rs. 15 for A and Rs. 16 for B.
- (i)Determine the break- even point, in units, for each alternative.
- (ii)At what volume of output would the two alternatives yield the same profit ?
- (iii)If expected annual demand is 12,000 units, which alternative would yield a higher profit ?
3. (a) Why are new facilities built on sites that are far away from the companies'
present sites ? Justify your answer with suitable examples'
(b) The time following observations have been taken in a study experiment :
|
Observation |
Time (in minutes) |
|
1 |
0.11 |
|
2 |
0.10 |
|
3 |
0.11 |
|
4 |
0.10 |
|
5 |
0.14 |
|
6 |
0.10 |
|
7 |
0.10 |
|
8 |
0.09 |
|
9 |
0.12 |
|
10 |
0.09 |
|
11 |
0.12 |
|
12 |
0.11 |
Determine
(i) the observed time,
(ii) the norrnal time, and
(iii) the standard time,
using a performance rating of 0.95 and a percent allowance of 8 percent
4- (a) Define value analysis. Differentiate between the traditional reduction technique and value analysis.
(b) A group of six jobs are to be processed through a two-step operation. The first operation involves leaning and the second involves painting . Determine a sequence that will minimize the total completion time for this group of jobs. Also, calculate the idle times for both machines.
|
Job |
Processing Time (Hours) Work Centre-l |
Processing Time (Hours) Work Centre-2 |
|
A |
20 |
27 |
|
B |
16 |
30 |
|
C |
43 |
51 |
|
D |
60 |
12 |
|
E |
35 |
28 |
|
F |
42 |
24 |
5. (a) why is R&D a key factor in productivity improvement ? Name some ways in which R&D contributes to productivity improvements.
(b) A local distributor for a national tyre company expects to sale approximately 9600 steel belted radial tyres of a certain size and tread design next year . annual carrying costs are rs 16 per tyre and ordering costs are rs75 . the distributor operates 288 days a year
(i) What is the EOQ ?
(ii) Howmanytimesperyeardoesthestore reorder ?
(iii) What is the length of an order cycle ?
6 The R&D Department is planning to bid on a large project for the development
of a new communication system for commercial planes. The accompanying table shows the activities, times, and sequences required.
|
Activity |
Immediate Predecessor |
Time (Weeks) |
|
A |
- |
3 |
|
B |
A |
2 |
|
C |
A |
4 |
|
D |
A |
4 |
|
E |
B |
6 |
|
F |
C,D |
6 |
|
G |
F |
2 |
|
H |
C,D |
3 |
|
I |
E,G,H |
3 |
(a) Draw the Network Diagram.
(b) What is the critical path ?
(c) Suppose you want to shorten the completion time as much as possible,
and have the option of shortening any or all of B, c, D and G, each two weeks. Which would you shorten ?
- (b)What is the new critical path and earliest completion time ?
7 . Write short notes on any four of the following :
(a) Cost of Quality
(b) CIM
(c) Standardization and Codification
(d) Buffer Stock
(e) Zero defects
(f) Taxonomy of waste
