samuelroberthill

At a store, 1,100 radials each year are sold on average. Last two years, 200 and 260 sold in Fall. 360 and 320 in WInter. 150 and 160 in Spring. 340 and 410 in Summer. Next year expected sales are 1,300 radials. Season Demand fall winter spring summer Projected sales; what is the demand for each season

Fall 272 Winter 402 Spring 183 Summer 443

A foundry produces circular utility access hatches. If 120 covers are produced in a 10-hour shift, the productivity of the line is: a. 12 covers/hr b. 1200 covers/hr c. 1.2 covers/hr d. 120 covers/hr e. 2 covers/hr

A

Activity Time Predecessor(s) a 5 b 8 c 3 A d 3 A e 5 B f 6 B g 11 C,E h 7 D, F ES and EF Activity ES EF A 5 B 0 C 8 D 5 E 13 F 8 G 24 H 21 LS AND LF ACTIVITY LS LF H 17 G 13 F 11 E 8 D 14 C 10 B 0 A 5 SLACK ACTIVITY A B C D E F G H CRITICAL PATH ARE: COMPLETION TIME;

ES and EF 0,8,5,8,8,14,12,14 LF 24,24,17,13,17,13,8,10 SLACK 5,0,5,9,0,3,0,3 CRITICAL PATH: B-E-G COMPLETION TIME: 24 WEEKS

ACTIVITY a m b A 10 14 19 B 27 32 42 C 18 18 18 D 7 14 20 E 18 19 19 F 17 20 13 EXPECTED TIMES: A B C D E F STANDARD DEVIATION A B C D E F

EXPECTED TIMES: 14.17,32.83,18,13.83,18.83,20 STANDARD DEVIATION: 1.5,2.5,0,2.17,0.17,1

Trend adjusted exponential smoothing T At Ft Tt FIT 1 10 9 2 11 2 18 10.8 1.92 12.72 3 24 13.78 2.34 16.12 4 19 17.7 2.97 20.67 5 25 6 22 7 30 8 26 9 36 10

Ft Tt FIT 20.34, 2.84, 23.18 23.54, 2.98, 26.52

Expected project completion 22 months and variance of 4 a. probability it will be completed in 18 months b. 21 months c. 24 months d. 26 months e.The die date that yields a 95% chance of completion = _months

0.00228 0.3085 0.8413 0.9773 25.29 months

From a sample size of 10 pistons Day Mean X Range R 1, 154.9, 4.2 2, 153.2, 4.4 3, 151.6, 4.3 4, 155.5, 5.2 5, 154.6, 4.3 What is the value of double bar x? What is the value of double bar R? What is the UCLx and LCLx? What is the UCLR and LCLR? What is UCLx and LCLx if true diameter is 155?

153.96 4.48 155.34 and 152.58 7.96 and .99 156.38 and 153.62

Operations management is applicable: a) to all firms, whether manufacturing or service b) to manufacturing sector exclusively c) mostly to the service sector d) to services exclusively e) mostly to the manufacturing sector

A

Which of the following are among the 10 strategic operations management decisions? i. the design of goods and services ii. managing quality iii. layout strategy iv. marketing v. pricing of goods and services a. i, ii, iii b. ii, iii, v c. i, ii, iv d. i, ii, v e. all of the above

A

Which of the following has progressed the furthest along its product life cycle? a. drive though restaurants b. boeing 787 c. 3d videogames d. xbox 360 e. iPods

A

Which of the following is not a type of qualitative forecasting? a. moving average b. market survey c. Delphi method d. jury of executive e. sales force composite

A

A fish bone chart is also known as a: a. cause and effect diagram b. kanban diagram c. kaizen diagram d. poka-yoke diagram e. taguchi diagram

A.

If a sample of parts is measured and the mean of the measurements is outside the control limits, the process is: a. out of control and the process should be investigated b. in control, but not capable of producing within established control limits c. within the established control limits with only natural causes of variation d. monitored closely to see if the next sample mean will also fall outside the control limits e. none of the above

A.

Which of the following statements regarding PERT analysis is true? a. only critical activities contribute to the project variance b. project standard deviation is the sum of all critical activity standard deviations c. each activity has two estimates of its duration d. project variance is the sum of all activity variances e. the most likely time is equivalent to the expected activity time

A.

Which of these statements regarding time-cost tradeoffs in CPM networks is true? a. crashing shortens the project duration by assigning more resources to one or more of the critical tasks b. activities not on the critical path can never be on the critical path, even after crashing c. the crash time always exceeds the normal time d. crashing a project often reduces the length of long-duration, but noncritical, activites e. crashing is not possible unless there are multiple critical points

A.

A forecasting method has produced the following over the past five months. What is the mean absolute deviation? Actual Forecast Error IErrorI 10, 11, -1, 1 8, 10, -2, 2 10, 8, 2, 2 6, 6, 0, 0 9, 8, 1, 1 a. 0.0 b. 1.2 c. 8.6 d. -0.2 e. -1.0

B

Gradual upward or downward movement of dat over time is called: a. seasonality b. a trend c. a cycle d. random variation e. exponential variation

B

The c-chart signals whether there has been a : a. change in the AQQ b. change in the number of defects per unit c. change in the percent defective in a sample d. gain or loss in uniformity e. change in the central tendency of the process output

B

The number of defects after a hotel room cleaning should be measured using what type of control chart? a. p-chart b. c-chart c. x-bar chart d. r-chart e. either x-bar chart or r chart

B

The primary purpose of the MAD in forecasting is to: a. seasonally adjust the forecast b. measure forecast accuracy c. eliminate forecast errors d. remove random variations e. estimate the trend line

B

The time an activity will take assuming unfavorable conditions is: a. minimum b. pessimistic c. optimistic d. activity variance e. exactly twice as long as expected

B

Which of the following statements best characterizes delivery reliability? a. a company that delivers faster that its competitors b. a company that always delivers at the promised time c. a company that has a computerized delivery scheduling system d. a company that delivers more frequently than its competitors e. a company that always delivers on the same day of the week

B

Among the tools of TQM, the tool ordinarily used to aid in understanding the sequence of events through which a product travels is a: a. taguchi map b. poka-yoke c. flowchart d. check sheet e. pareti chart

C

The critical path for the network activities shown below is_______ with duration______. Activity Duration Predecessor A 4 B 2 A C 7 D 4 A E 5 B, C, D a. abe; 11 b. abd; 10 c. ade; 13 d. ce; 12 e. abcde; 22

C

Which type of the following tasks within an airline company are related to operations? a) A/P b) Sales c) Crew Scheduling d) Advertising e) International Monetary Exchange

C

If Brandon Edward were working to develop a forecast using a moving averages approach, but he noticed a detectable trend in the historical data, he should: a. change to a qualitative approach b. use a simple moving average c. use weights to place more emphasis on recent data d. use weights to minimize the importance of the trend e. change to an associative multiple aggression approach

C.

The four M's of cause and effect diagrams are: a. material, management, manpower, and motivation b. material, methods, men, and mental attitude c. material, machinery/equipment, manpower, and methods d. mentality, motivation, management, and manpower e. named after four quality experts

C.

A nationwide parcel delivery service keeps track of the number of lat deliveries per day. They plan on using a control chart to plot their results. Which type of control chart would you recommend? a. x-bar chart b. both p chart and c chart c. both x bar and r chart d. c chart e. p chart

D

An operations manager is not likely to be involved in: a) the design of goods and services to satisfy customers' wants and needs b) work scheduling to meet the due dates promised to customers. c) maintenance schedules d) the identification of customers' wants and needs. e) the quality of goods and services to satisfy customers' wants and needs.

D

Increasing the number of periods in a moving average will accomplish greater smoothing, but at the expense of: a. manager understanding b. accuracy c. stability d. sensitivity to real changes in data e. all of the above are diminished when the number of periods incease

D

Jars of pickles are sampled and weighed. Sample measures are plotted on control charts. The ideal weight should be precisely 11 oz. Which type of chart(s) would you recommend? a. c-chart b. both a p-chart and c-chart c. p-chart d. both an x-bar chart and an r-chart e. an x-bar chart, but not an r-chart

D

Productivity can be improved by: a. increasing inputs while holding outputs steady b. increasing inputs and outputs the same proportion c. decreasing outputs while holding steady inputs d. decreasing inputs while holding steady outputs e. none of the above

D

What is the forecast for May using a four month average? Nov 39 Dec 36 Jan 40 Feb 42 Mar 48 Apr 46 a. 38 b. 43 c. 42 d. 44 e. 47

D

Which of the following is the best example of competing on low cost-leadership? a. A firm's products are introduced into the market faster that its competitors b. A firm advertises more than its competitors c. A firm offers more reliable products than its competitors do d. A firm produces its product with less raw material waste than its competitors do e. A firm's research and development department generates many different ideas for new products.

D

A simple cpm has three activities. A B and C. A is an immediate predecessor of B and C. B is an immediate predecssor of C. The activity durations are A=4, B=3, C=8. a. the critical path can't be determined without pert expected activity times b. the network has no critical path c. a-c duration 12 d. a-b-c duration 13.5 e. a-b-c duration 15

E

Multinational organizations can shop from country to country and cut costs through: a. lower taxes and tariffs b. lower wage scales c. lower indirect costs d. less stringent regulations e. all of the above

E

The ability of an organization to produce goods or services that have some uniqueness in their character is: a. competing on quality b. time-based competition c. competing on productivity d. mass production e. competing on differentiation

E

Which of the following represents a reason for globalizing operations? a. to improve the supply chain b. to improve operations c. to attract and retain global talent d. to expand a product's life cycle e. all of the above

E

All organizations, including service firms such as banks and hospitals, have a production function. True False

True

NAFTA seeks to phase out trade and tariff barriers among Canada, Mexico, and the US. True False

True

Operations management is the set of activities that creates value in the form of goods and services by transforming inputs into outputs. True False

True

Production processes are being dispersed to take advantage of national differences in labor costs. True False

True

Quarter Guests Winter1, 58 spring1, 94 summer1, 155 fall1, 75 winter2, 65 spring2,82 summer2, 125 fall2, 54 winter3, 99 spring3, 156 summer3, 207 fall3, 97 Find the seasonal indices for each of the seasons.

Winter 0.701 Spring 1.046 Summer 1.534 Fall 0.712

Kleen Karpet cleaned 65 rugs in October, consuming the following resources: Labor: 520 hours at $13 per hour Solvent: 125 gallons at $8 per gallon Machine Rental: 20 days at $50 per day a. Labor productivity per dollar= b. Multifactor productivity=

a. 0.0096 b. 0.0074

Week Pints Aug 31 350 Sept 7 389 Sept 14 408 Sept 21 381 Sept 28 368 Oct 5 374 a. 3 week Moving Average week of Oct 12= b. weights of .2 , .3, and .5 from oldest to most recent for 3 week moving avg= c. exponential smoothing find the forecast alpha=.3 Week Of Pints Forecast Aug 31 350 350 Sept 7 389 350 Sept 14 408 361.7 Sept 21 381 Sept 28 368 Oct 5 374 Oct 12 -------

a. 374.33 b. 373.6 c. 375.59, 377.21, 374.45, 374.32

Chuck Sox makes wooden boxes in which to ship motorcycles. Chuck and his three employees invest a total of 30 hours a day making 200 boxes. a. Their productivity = They can now make 400 per day. b. New productivity= c. unit increase in probability= d. percentage increase in probability=

a. 6.67 b. 13.33 c. 6.66 d. 98.85%