Operations Mgmt Homework

Details: Complete supplement problems S7.3, S7.5, S7.7, S7.11, S7.15, and S7.28 in the textbook.

Submit one Excel file. Put each problem result on a separate sheet in your file. 

Problems Note: PX means the problem may be solved with POM for Windows and/or Excel OM.

S7.3 If a plant has an effective capacity of 6,500 and an

efficiency of 88%, what is the actual (planned) output?

S7.5 Material delays have routinely limited production

of household sinks to 400 units per day. If the plant efficiency is

80%, what is the effective capacity?

S7.7 Southeastern Oklahoma State University’s business

program has the facilities and faculty to handle an enrollment

of 2,000 new students per semester. However, in an effort

to limit class sizes to a “reasonable” level (under 200, generally),

Southeastern’s dean, Holly Lutze, placed a ceiling on enrollment

of 1,500 new students. Although there was ample demand for

business courses last semester, conflicting schedules allowed only

1,450 new students to take business courses. What are the utilization

and efficiency of this system?

S7.11The three-station work cell illustrated in Figure S7.7

has a product that must go through one of the two machines at

station 1 (they are parallel) before proceeding to station 2.

Station 1 Machine A

Capacity: 20 units/hr

Station 2 Capacity: 5 units/hr

Station 1Machine B

Station 3 Capacity: 12 units/hr

Capacity: 20 units/hr

a) What is the bottleneck time of the system?

b) What is the bottleneck station of this work cell?

c) What is the throughput time?

d) If the firm operates 10 hours per day, 5 days per week, what is

the weekly capacity of this work cell?

S7.15 A production process at Kenneth Day Manufacturing

is shown in Figure S7.9. The drilling operation occurs separately

from, and simultaneously with, the sawing and sanding operations.

A product needs to go through only one of the three assembly

operations (the operations are in parallel).

a) Which operation is the bottleneck?

b) What is the bottleneck time?

c) What is the throughput time of the overall system?

d) If the firm operates 8 hours per day, 20 days per month, what

is the monthly capacity of the manufacturing process?

S7.28 James Lawson’s Bed and Breakfast, in a small historic

Mississippi town, must decide how to subdivide (remodel)

the large old home that will become its inn. There are three

alternatives: Option A would modernize all baths and combine

rooms, leaving the inn with four suites, each suitable for two to

four adults. Option B would modernize only the second floor; the

results would be six suites, four for two to four adults, two for

two adults only. Option C (the status quo option) leaves all walls

intact. In this case, there are eight rooms available, but only two

are suitable for four adults, and four rooms will not have private

baths. Below are the details of profit and demand patterns that

will accompany each option:

ALTERNATIVES	ANNUAL PROFIT UNDER VARIOUS DEMAND PATTERNS
	HIGH	P	AVERAGE	P
A (modernize all)	$90,000	.5	$25,000	.5
B (modernize all)	$80,000	.4	$70,000	.6
C (status quo)	$60,000	.3	$55,000	.7

Which option has the highest expected monetary value? PX