MS-5 Dec, 2007
MS-5 : MANAGEMENT OF MACHINES AND MATERIALS
l. (a) Explain how the system concept can be used in explaining the terms waste and waste management.
(b) A company is considering adding a new feature that will increase unit sales by !2 percent and product cost by 10 percent. Profit is expected to increase by 16 percent of the increased sales. Initially the product cost incurred by the company was 63 percent of the sales price. Should the new feature be added ? Justify your answer.
2. (a) Four different organisations are considering youl home town as a potential location for one of the following :
(i) A medical research centre
(ii) A softdrink producer
(iii) A steel plant
(iv) A software producer
Select any one of the above four and systematically evaluate the relevant locational factors.
(b) A worker in an engineering corporation is expected to work for 420 minutes in a shift of 8 hours . the remaining time, i.e. 60 minutes is meant for rest and personal needs etc.
Determine :
(i) Standard time per piece of a job whose normal time is 4 minutes.
(ii) If the operator produces 120 pieces in the shift, what is his efficiency ?
3. a)Explain different types of maintenance, giving suitable examples. Suggest an organisation structure for the maintenance department of a medium-sized company
(b) A small manufacturing firm has three proposals for a product. Either it can be purchased from an outside vendor at Rs. 4 per unit or it can be manufactured in-plant. There are alternatives for in-plant-manufacturing. One option it that a fully
automatic unit is procured involving fixed cost of Rs. 30,000 and variable cost of Rs. 275 per unit. Alternatively, a semi-automatic unit would cost Rs. 20,000 as fixed cost and Rs. 3 per unit as variable cost.
Draw a break-even chart for these alternatives. Suggest range of production-volume suited for these alternatives.
4. a) Explain various factors that govern the design of any layout of a plant. Give suitable examples.
b) There are seven jobs as under, each of which has to go through machines A and B in that order. The processing time is in hours.
|
Job |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
|
Machine A |
3 |
12 |
15 |
6 |
10 |
11 |
9 |
|
Machine B |
8 |
10 |
10 |
8 |
12 |
1 |
3 |
Determine the sequence of jobs that will minimize the total time for completion of all the jobs.
5. (a) What do you understand by Quality ? What is the difference between inspection and quality ? Describe the concept of Total Quality Management. How is it different from inspection and quality control ?
b) A repair and maintenance company is engaged in providing service to a particular brand o[ popular vehicle. It uses 8000 units of a moving part per year as replacement of the old parts; each part cost Rs. 250. The set-up costs are estimated at Rs. 100 and the inventory carrying cost is the average of 20% of the inventory cost. Supply of the parts is at the rate of 80 per day.
Calculate the following :
(i) Optimal order quantity
(ii) Optimal number of set-ups
(iii) Total variable cost based on optimal policy
Assume 310 working days in a year
6. The R&D department is planning to bid on a large proiect for the development of a new communication system for commercial planes. The following table shows the activities, times, and sequences required
|
Activity |
Immediate Predecessor |
Time (Weeks) |
|
A |
- |
2 |
|
B |
- |
3 |
|
C |
- |
3 |
|
D |
A |
5 |
|
E |
B |
5 |
|
F |
B |
9 |
|
G |
C |
3 |
|
H |
D |
3 |
|
I |
E |
5 |
|
J |
F,G |
6 |
|
K |
H,I |
4 |
(a) Draw the network diagram.
(b) What is the critical path ?
(c) How many weeks will it take to complete the project ?
(d) Which activities have slack and how much ?
7 . Write short notes on any four of the following :
(a) Operating characteristic curve
(b) ABC Analysis
(c) Job Enrichment
(d) CAD/CAM
(e) Tero Technology
(f) Aggregate planning
