Homework Week 02
Problem 2
Last week a painter painted three houses in five days. This week she painted two houses in four
days. In which week was the painter more productive?
First week
Problem 2
Productivity in week 1 = 3 houses/5days = 0.6 houses per day
Productivity in week 2 = 2 houses/4days = 0.5 houses per day
The painter was more productive in week 1.
Problem 4
A company that makes kitchen chairs wants to compare productivity at two of its facilities. At
facility #1, six workers produced 240 chairs. At facility #2, four workers produced 210 chairs
during the same time period. Which facility was more productive?
Productivity at facility #1 = 240 chairs/6 workers = 40 chairs per worker
Productivity at facility #2 = 210 chairs/4 workers = 52.5 chairs per worker
Answer Facility #2 is more productive.
Aztec Furnishings makes hand-crafted furniture for sale in its retail stores. The furniture maker
has recently installed a new assembly process, including a new sander and polisher.With this new
system, production has increased to 90 pieces of furniture per day from the previous 60 pieces of
furniture per day. The number of defective items produced has dropped from 10 pieces per day to
1 per day. The production facility operates strictly eight hours per day. Evaluate the change in
productivity for Aztec using the new assembly process
- A bakery oven produces 346 pastries in 4 hours. What is its productivity?
- Two workers paint tables in a furniture shop. If the workers paint 22 tables in 8 hours, what is
their productivity?
Med-First is a medical facility that offers outpatient medical services. The facility is
considering offering an additional service, mammography screening tests, on-site. The facility
estimates the annual fixed cost of the equipment and skills necessary for the service to be
$120,000. Variable costs for each patient processed are estimated at $35 per patient. If the
clinic plans to charge $55 for each screening test, how many patients must it process a year
in order to break even?
(a) To compute the break-even quantity:
The break-even quantity is 3250 pairs. This is how much Fred would have to sell to cover
costs.
Problem 6
Harrison Hotels is considering adding a spa to its current facility in order to improve its list of
amenities. Operating the spa would require a fixed cost of $25,000 a year. Variable cost is
estimated at $35 per customer. The hotel wants to break even if 12,000 customers use the spa
facility. What should be the price of the spa services?
Homework Week 04
Problem 2
A jet engine has ten components in series. The average reliability of each component is 0.998.
What is the reliability of the engine? 0.980 Reliability of engine = (0.998)10 = 0.980
Problem 4 An engine system consists of three main components in a series, all having the
same reliability. Determine the level of reliability required for each of the components if the
engine is to have a reliability of 0.998. Level of reliability= 0.9993
Problem 4 (Reliability)3
= 0.998, so (0.998)1/3 = 0.9993
Therefore, reliability of each component = 0.9993
Problem 8
A University Web server has five main components each with the same reliability. All five
components must work for the server to function as intended. If the University wants to
have a 95 percent reliability, what must be the reliability of each of the components?
Reliability of each component=
0.9898
Problem 8
(Reliability)5
= 0.95, so (0.95)1/5 = 0.9898
Therefore, reliability of each component = 0.9898 - What outsourcing functions does UPS provide for clients? inventories and
deliveries - Which of the following concepts is linked the least with Henry Ford? mass
customization - When was the first mathematical model for inventory management developed? 1913
- At the GAP, which function plans and coordinates all the resources needed to design,
produce, and deliver the merchandise to its various retail locations? operations
management - Who popularized the moving assembly line? Henry Ford
- Which of the following would not be considered a core competency that a company
might have? an inefficient distribution system - Operational efficiency is: performing operations tasks well
- Computer-aided manufacturing is an example of what? Process Technology
- Decisions regarding which of the following are not part of the production process
structure? management policies - Technology should be acquired because: the new technology supports the
company’s chosen competitive priorities - All product designs begin with __ . an idea
- In product screening, issues such as, “What is the market size?” and “What is the long
term-product potential?” are addressed by: Marketing - In product screening, issues such as “Will we need new facilities and equipment?”
and “Can material for production be readily obtained?” are addressed by Operations - Services with low customer contact are called quasi-manufacturing
- Marketing is a vital link between customers and product design.
- Which of the following is not considered to be a characteristic of partnership
relations? Are “arms-length” in nature - When do rationing and shortage gaming occur? Demand exceeds supply
- Crossdocking allows the retailer to replace __ with information and
coordination. Inventory - What does ESI stand for? Early supplier involvement
- What term refers to the working relationship between partners? Intimacy
- Who developed a formula for determining the cost of poor quality? Genichi Taguchi
- The Japanese term for continuous improvement is Kaizen
- In six-sigma the level of defects is reduced to approximately 3.4 parts per million
- A __ shows the frequency distribution of observed values of a variable.
Histogram - Not only does TQM encompass the entire organization but it stresses quality is
customer driven
Homework Week 07
Problem 2. A manufacturer of printed circuit boards has a design capacity of 1000 boards
per day. The effective capacity, however, is 700 boards per day. Recently, the production
facility has been producing 950 boards per day. Compute the design and effective capacity
utilization measures.
Utilization Design = 95%
Problem 6. The design and effective capacities for a local emergency facility are 300 and 260
patients per day, respectively. Currently the emergency room processes 250 patients per day.
Utilization Effective = 96.15% Utilization Design = 83.33
Utilization Effective = ActualOutput/EffectiveCapacity * 100 = 250/260 * 100 = 96.2%
Utilization Design = ActualOutput/DesignCapacity *100 = 250/300 * 100 = 83.3%
Problem 6. Gator Office Systems has interviewed managers in order to develop the from–to
matrix: Current Layout- 419 Proposed Layout 883
Problem 8. David’s Sport Supplies is a store that sells sports equipment and gear for
teenagers and young adults. David’s is in the process of assigning the location of storage areas
in its warehouse to minimize the number of trips made to retrieve needed items. Which
location scheme is the best? Top 55312 bottom 53314 top 45513 bottom 25133
Problem 10. MMS Associates is a telecommunications service provider. The company is
currently redesigning its main office to accommodate six newly hired salespeople- How does
it compare to the original plan considered? An alternative plan is Better
Homework Week 08
Problem 6. The Arkade Company has decided to use a 15 percent allowance factor based on
job time. Calculate the standard time for each work element and for the total job. The
frequency equals 1 for all work elements.
Work
Element
Mean
Observed
Time
(minutes)
Perfomance
Rating
Factor
ST
1 1.20 0.95 1.311
2 1.00 0.85 0.97775
3 0.80 1.10 1.012
4 0.90 1.10 1.1385
STjob = 4.439
ST=(NT)(AF), where AF = 1 + PFD = 1 + 0.15 = 1.15
STelement 1=(1.14)(1.15)=1.311
STelement 2=(0.85)(1.15)=0.978
STelement 3=(0.88)(1.15)=1.012
STelement 4=(0.99)(1.15)=1.139
STjob=(1.311+0.987+1.012+1.139)=4.440
Problem 8 The Arkade Company is considering switching to a 15 percent allowance based on
time worked. Calculate the new standard time for each work element and for the total job.
The frequency equals 1 for all work elements.
Work Element
Mean
Observed
Time
(minutes)
Perfomance
Rating Factor ST
1 1.20 0.95 1.341
2 1.00 0.85 1.000
3 0.80 1.10 1.035
4 0.90 1.10 1.165
STjob = 4.541
Problem 10. The Arkade Company used a 15 percent allowance factor based on job time and
15 percent allowance based on time worked.
What allowance factor is better when all of the jobs an emlpoyee does are similar and have
the same allowance factor? Time Worked
Compare standard times and units produced per day based on both allowance factors and
decide which of them provides the best result. Job Time
Problem 4. Using the following project information, choose the right network diagram.
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