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CORK INSTITUTE OF TECHNOLOGY
INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ
Semester 1 Examinations 2012/
Manufacturing Systems
Module Code: MANU 8004
School: Mechanical, Electrical & Process Engineering
Programme Title: BSc (Honours) Process Plant Technology BEng (Honours) Mechanical Engineering BEng (Honours) Biomedical Engineering
Programme Code: EPPTE_8_Y EMECH_8_Y3, EMECH_8_Y EBIOM_8_Y3, EBIOM_8_Y
External Examiner(s): Mr K. McCarthy, Mr G. Reilly Prof. S. Leen, Mr. Tom O’Connor Dr L. McNamara, Mr. R. Cullinane Internal Examiner(s): Michael P O’Mahony
Instructions: Answer THREE Questions
Duration: 2 hours
Sitting: Winter 2012
Requirements for this examination:
Note to Candidates: Please check the Programme Title and the Module Title to ensure that you have received the correct examination paper. If in doubt please contact an Invigilator.
Q1.
(a) Define the following terms in the context of Work Measurement Standard Performance Qualified Worker. (8 Marks)
(b) Compare Direct Time Study to Work Sampling Systems as means of Work Measurement, indicating advantages and disadvantages of each and when one system would be preferred over the other. (8 Marks)
(c) A Time study was done to determine the standard time for hand packing of a box of printer cartridges. Each box contains 36 cartridges, packed into 4 layers of 9. Each layer is separated by a cardboard sheet; this sheet is placed on to the top of a layer of cartridges but is not placed on the top layer in the box. The boxes are supplied on pallets, each pallet containing 50 boxes.
The data from the Time study is shown in Table Q1 (this is to be submitted with the answer book)
The study elements are:
Element Ref Element Description RA A Pick up one empty box from a nearby pallet and place it on to the packing bench
B Pick up one cartridge from the side of the packing bench and place it in the box
C Pick up a cardboard sheet and place it on top of a layer of cartridges
D Fold and seal the top of the box with tape^ 12% E Place the full box aside (ready for collection)
F Fetch a pallet load of empty boxes and place near the bench
(i) Calculate the standard time for one box of cartridges. (15 Marks) (ii) Calculate the timing error and comment on its acceptability. (2 Marks)
Q
In the context of manufacturing, a) Define LEAN (5 marks) b) Explain SMED and detail how this is implemented. (12 marks) c) Explain the EIGHT Wastes (16 marks)
Name:________________________________
Time started: 13:10Hrs OT - Observed Times Time Finished: 13:32Hrs BM - Basic Minutes
Time Shown in decimal Minutes
Element Ref Rating OT BM Element Ref Rating OT BM
Check Time - 60 - C 80 23 F 90 180 B 100 13 A 80 45 B 100 12 B 105 12 B 100 13 B 90 15 B 105 12 B 100 13 B 100 13 B 80 16 B 95 14 B 85 15 B 90 14 B 120 10 B 90 14 B 100 13 B 85 15 B 110 11 C 90 22 B 75 18 B 100 13 C 100 20 B 100 13 B 100 13 B 100 12 B 100 12 B 90 14 B 105 11 B 90 15 B 95 13 B 80 16 B 90 14 B 80 20 B 85 15 B 75 17 B 60 20 B 70 18 B 70 17 Tea Break 1020 B 80 16 D 80 65 Talk to Foreman 165 E 100 34 Check Time 70
Element Basic Time – Minutes
RA % Work Content Std Minutes
Frequency Work Content per Cycle A B C D E F
Table Q
