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Saint GBA334 final exam

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Question. Question;The first step in planning and;scheduling a project is to develop the __________.;Student Answer: employee scheduling plan;PERT/CPM network diagram;critical path;work breakdown structure;variance calculations for each activity;Points Received: 2 of 2;Comments;Question 2. Question;The critical path of a network;is the;Student Answer: shortest time path through the network.;path with the fewest activities.;path with the most activities.;longest time path through the network.;none of the above.;Points Received: 2 of 2;Comments;Question 3. Question;PERT;Student Answer: assumes that we do not know ahead of time;what activities must be completed.;assumes that activity time estimates follow;the normal probability distribution.;is a network technique that uses three time;estimates for each activity in a project.;is a deterministic network technique that;allows for project crashing.;None of the above is correct.;Points Received: 2 of 2;Comments;Question 4. Question;The following table represents;a project with four activities. All times are in weeks.;Click here to view a Word version of the table.;Using the data in the table, what is the minimal expected;completion tiime (in weeks) for the project?;Student Answer: 18;19;37;11;None of the above;Points Received: 2 of 2;Comments;Question 5. Question;A post office has a single;line for customers waiting for the next available postal clerk. There are two;postal clerks who work at the same rate. The arrival rate of customers follows;a Poisson distribution, while the service time follows an exponential;distribution. The average arrival rate is three per minute and the average;service rate is two per minute for each of the two clerks. What is the average;length of the line?;Student Answer: 3.429;1.929;1.143;0.643;None of the above;Points Received: 2 of 2;Comments;Question 6. Question;Two characteristics of;arrivals are the line length and queue discipline.;Student Answer: True;False;Points Received: 2 of 2;Comments;Question 7. Question;Which of the following;questions can be answered by PERT?;Student Answer: When will the entire project be completed?;What is the probability that the project will;be completed by a specific date?;What are the critical activities?;What are the noncritical activities?;All of the above;Points Received: 2 of 2;Comments;Question 8. Question;One difficulty in waiting line;analysis is that it is sometimes difficult to place a value on customer waiting;time.;Student Answer: True;False;Points Received: 2 of 2;Comments;Question 9. Question;If the total supply from the;sources does not equal the total demand from the destinations in the;transportation problem;Student Answer: and if supply is greater than demand, add a;dummy source or factory.;the amount put in a dummy source or;destination should make supply and demand equal.;and if demand is greater than supply, add a;dummy destination or warehouse.;all of the above.;none of the above.;Points Received: 2 of 2;Comments;Question 10. Question;Consider the following linear;programming model;Maximize X12 + X2 +;3X3;Subject to;X1 +;X2? 3;X1 +;X2? 1;X1;X2? 0;This problem violates which of the following assumptions?;Student Answer: Certainty;Proportionality;Divisibility;Linearity;Integrality;Points Received: 0 of 2;Comments;Question 11. Question;A company must assign;mechanics to each of four jobs.;Click here to view an Excel version of the table.;The time involved varies according to individual abilities.;The table shows how many minutes it takes each mechanic to perform each job. If;the optimal assignments are made, how many total minutes would be required for;completing the jobs?;Student Answer: 0;4;17;16;None of the above;Points Received: 2 of 2;Comments;Question 12. Question;Transportation models can be;used for which of the following decisions?;Student Answer: Facility location;Production mix;Media selection;Portfolio selection;Employee shift scheduling;Points Received: 2 of 2;Comments;Question 13. Question;Consider the following linear;programming problem;Maximize 4X + 10Y;Subject to;3X +;4Y? 480;4X +;2Y? 360;all;variables? 0;The feasible corner points are (48,84), (0,120), (0,0);(90,0). What is the maximum possible value for the objective function?;Student Answer: 1,032;1,200;360;1,600;None of the above;Points Received: 2 of 2;Comments;Question 14. Question;Variations that need not occur;in production processes are referred to as __________.;Student Answer: assignable variations;control variations;natural variations;process variations;none of the above;Points Received: 2 of 2;Comments;Question 15. Question;The following table represents;a project with known activity times. All times are in weeks.;Click here to view a Word version of the table.;Using the data in the table, what is the latest possible;time (in weeks) that C may be started without delaying completion of the;project?;Student Answer: 0;4;8;10;None of the above;Points Received: 2 of 2;Comments;Question 16. Question;The p-chart is useful when we;Student Answer: take a number of measurements and compute the;average.;take a number of measurements and compute the;ranges.;find the fraction of the production lot;defective.;find the number of defective items in a;production lot.;None of the above is correct.;Points Received: 2 of 2;Comments;Question 17. Question;Which of the following is not;an assumption of LP?;Student Answer: Simultaneity;Certainty;Proportionality;Divisibility;Additivity;Points Received: 2 of 2;Comments;Question 18. Question;Bank Boston has a branch at;Bryant College. The branch is busiest at the beginning of the college year when;freshmen and transfer students open accounts. This year, freshmen arrived at;the office at a rate of 40 per day (assume 8-hour days). On average, it takes;the Bank Boston staff person about ten minutes to process each account;application. The bank is considering having one or two tellers. Each teller is;paid $12 per hour and the cost of waiting in line is assumed to be $8 per hour.;Which model is preferred?;Student Answer: One-channel;Two-channel;Both are the same;Points Received: 2 of 2;Comments;Question 19. Question;A certain firm has four;different operations that must be assigned to four locations. The profit (in;thousands of dollars) associated with each operation at each location is;presented below. The firm's vice president would like to assign the various;operations so that the total profit is maximized. Find the appropriate;assignments.;Click here to view an Excel version of the table.;Using the data in the table, what is the optimal location;for Operation Z?;Student Answer: 1;2;3;4;Points Received: 2 of 2;Comments;Question 20. Question;A feasible solution to a;linear programming problem;Student Answer: must be a corner point of the feasible;region.;must satisfy all of the problem's constraints;simultaneously.;need not satisfy all of the constraints, only;the non-negativity constraints.;must give the maximum possible profit.;must give the minimum possible cost.;Points Received: 2 of 2;Comments;Question 21. Question;Management resources that need;control include machinery usage, labor volume, money spent, time used;warehouse space used, and material usage.;Student Answer: True;False;Points Received: 2 of 2;Comments;Question 22. Question;The following table represents;a project with four activities. All times are in weeks.;Click here to view a Word version of the table.;According to the data in the table, there are four;activities in the project. Assume the normal distribution is appropriate to use;to determine the probability of finishing by a particular time. If you wished;to find the probability of finishing the project in 20 weeks or fewer, it would;be necessary to find the variance and then the standard deviation to be used;with the normal distribution. What variance would be used?;Student Answer: 2;4;8;12;None of the above;Points Received: 2 of 2;Comments;Question 23. Question;Which tableau is the solution;to the following transportation table? Click here to view a Word version of the;table.;Student Answer: Click here to view a Word version of the;table.;Click here to view a Word version of the;table.;Click here to view a Word version of the;table.;Click here to view a Word version of the;table.;None of the above;Points Received: 0 of 2;Comments;Question 24. Question;The maximal-flow model assumes;that there is a net flow from "source" to "sink.;Student Answer: True;False;Points Received: 2 of 2;Comments;Question 25. Question;An automatic car wash is an;example of a constant service time model.;Student Answer: True;False;Points Received: 2 of 2;Comments;Question 26. Question;The points on the network are;referred to as nodes.;Student Answer: True;False;Points Received: 2 of 2;Comments;Question 27. Question;Click here to view a Word;version of the table.;Bags of chocolate candy are sampled to ensure proper weight.;The overall average for the samples is 36 ounces. Each sample contains twelve;bags. The average range is 1.3 ounces.;Using the data in the table above, what is the upper control;chart limit for the sample averages?;Student Answer: 36.3458;35.6542;38.3101;36.6279;37.1258;Points Received: 2 of 2;Comments;Question 28. Question;A suburban specialty;restaurant has developed a single drive-thru window. Customers order, pay, and;pick up their food at the same window. Arrivals follow a Poisson distribution;while service times follow an exponential distribution. If the average number;of arrivals is 6 per hour and the service rate is 2 every 15 minutes, how much;time will elapse (in hours) from the time a customer enters the line until;he/she leaves the restaurant?;Student Answer: 0.50;0.25;0.75;2.25;3.00;Points Received: 2 of 2;Comments;Question 29. Question;Frequently in queuing;problems, the number of arrivals per unit of time can be estimated by a;probability distribution known as the Poisson distribution.;Student Answer: True;False;Points Received: 2 of 2;Comments;Question 30. Question;When using a general LP model;for transportation problems, if there are 4 sources and 3 destinations, which;of the following statements is true?;Student Answer: There are typically 4 decision variables and;3 constraints.;There are typically 12 decision variables and;7 constraints.;There are typically 7 decision variables and;7 constraints.;There are typically 12 decision variables and;12 constraints.;There are typically 12 decision variables and;3 constraints.;Points Received: 0 of 2;Comments;Question 31. Question;The -chart is useful when we;Student Answer: take a number of measurements and compute the;average.;take a number of measurements and compute the;ranges.;find the fraction of the production lot;defective.;find the number of defective items in a;production lot.;None of the above is correct.;Points Received: 2 of 2;Comments;Question 32. Question;PERT stands for __________.;Student Answer: probabilistic evaluation and review technique;program evaluation and review technique;probability of expected run times;program of expected run times;project evaluation and review technique;Points Received: 2 of 2;Comments;Question 33. Question;A company can decide how many;additional labor hours to acquire for a given week. Subcontractor workers will;only work a maximum of 20 hours a week. The company must produce at least 200;units of product A, 300 units of product B, and 400 units of product C. In 1;hour of work, worker 1 can produce 15 units of product A, 10 units of product;B, and 30 units of product C. Worker 2 can produce 5 units of product A, 20;units of product B, and 35 units of product C. Worker 3 can produce 20 units of;product A, 15 units of product B, and 25 units of product C. Worker 1 demands a;salary of $50/hr, worker 2 demands a salary of $40/hr, and worker 3 demands a;salary of $45/hr. The company must choose how many hours they should contract;with each worker to meet their production requirements and minimize labor cost.;Assuming this is a linear programming problem, which of the;following is the optimal solution?;Student Answer: X1 = 7.69, X2 = 0, X3 = 9.23;X1 = 0, X2 = 7.69, X3 = 9.23;X1 = 0, X2 = 9.23, X3 = 7.69;X1 = 9.23, X2 = 7.69, X3 = 0;Points Received: 2 of 2;Comments;Question 34. Question;According to the table below;there are five activities in a PERT project.;Click here to view a Word version of the table.;Using the data in the table, what is the variance of the;critical path?;Student Answer: 5.222;1.111;1.222;0;4.222;Points Received: 2 of 2;Comments;Question 35. Question;Infeasibility in a linear;programming problem occurs when;Student Answer: there is an infinite solution.;a constraint is redundant.;more than one solution is optimal.;the feasible region is unbounded.;there is no solution that satisfies all the;constraints given.;Points Received: 2 of 2;Comments;Question 36. Question;In PERT, we assume that;Student Answer: the times to complete individual activities;are known with certainty.;all activities are carried out by staff from;our own organization.;the total cost of a project is independent of;the time to complete the project.;the total time to complete all activities on;the critical path is described by a normal distribution.;none of the above.;Points Received: 2 of 2;Comments;Question 37. Question;Bank Boston has a branch at;Bryant College. The branch is busiest at the beginning of the college year when;freshmen and transfer students open accounts. This year, freshmen arrived at;the office at a rate of 40 per day (assume 8-hour days). On average, it takes;the Bank Boston staff person about ten minutes to process each account;application. The bank is considering having one or two tellers. Each teller is;paid $12 per hour and the cost of waiting in line is assumed to be $8 per hour.;What is the total daily waiting cost for the two-teller;model?;Student Answer: $4.17;$11.20;$133.32;$266.56;Points Received: 2 of 2;Comments;Question 38. Question;The maximal-flow technique;finds the maximum flow of any quantity or substance through a network.;Student Answer: True;False;Points Received: 2 of 2;Comments;Question 39. Question;If items being transported;must go through an intermediate point before reaching a final destination, then;this situation is known as a(n) __________.;Student Answer: transshipment problem;assignment problem;transportation problem;intermediate point problem;None of the above;Points Received: 2 of 2;Comments;Question 40. Question;Which of the following is not;true about arrivals?;Student Answer: Random arrivals are independent of each;other.;Random arrivals cannot be predicted exactly.;The Poisson distribution is often used to;represent the arrival pattern.;Service times often follow the negative;exponential distribution.;The exponential distribution is often used to;represent the arrival pattern.;Points Received: 2 of 2;Comments;Question 41. Question;Consider the following linear;programming problem;Minimize 20X + 30Y;Subject to;2X +;4Y? 800;6X +;3Y? 120;X, Y;? 0;What is the optimum solution to this problem (X,Y)?;Student Answer: (0,0);(50,0);(0,100);(400,0);None of the above;Points Received: 0 of 2;Comments;Question 42. Question;A goal of many waiting line;problems is to help a firm find the ideal level of services that minimize the;cost of waiting and the cost of providing the service.;Student Answer: True;False;Points Received: 2 of 2;Comments;Question 43. Question;An arrival in a queue that;reneges is one who;Student Answer: after joining the queue, becomes impatient;and leaves.;refuses to join the queue because it is too;long.;goes through the queue, but never returns.;jumps from one queue to another, trying to;get through as quickly as possible.;None of the above is correct.;Points Received: 2 of 2;Comments;Question 44. Question;A suburban specialty;restaurant has developed a single drive-thru window. Customers order, pay, and;pick up their food at the same window. Arrivals follow a Poisson distribution;while service times follow an exponential distribution. If the average number;of arrivals is 6 per hour and the service rate is 2 every 15 minutes, what;proportion of the time is the server busy?;Student Answer: 0.25;0.50;0.75;2.25;3.00;Points Received: 2 of 2;Comments;Question 45. Question;In a single-channel;single-phase system, reducing the service time only reduces the total amount of;time spent in the system, not the time spent in the queue.;Student Answer: True;False;Points Received: 2 of 2;Comments;Question 46. Question;Which of the following is a;basic assumption of linear programming?;Student Answer: The condition of uncertainty exists.;Independence exists for the activities.;Proportionality exists in the objective;function and constraints.;Divisibility does not exist, allowing only;integer solutions.;Solutions or variables may take values from;-? to +?.;Points Received: 2 of 2;Comments;Question 47. Question;A widely used mathematical;programming technique designed to help managers and decision making relative to;resource allocation is called __________.;Student Answer: linear programming;computer programming;constraint programming;goal programming;None of the above;Points Received: 2 of 2;Comments;Question 48. Question;When receiving a shipment from;a supplier, inspection must be done to check the fraction of defective;products. This is best monitored by which of the following control charts?;Student Answer: x-bar chart;R-chart;p-chart;c-chart;None of the above;Points Received: 2 of 2;Comments;Question 49. Question;The work breakdown structure;involves identifying the __________ for each activity.;Student Answer: time;cost;resource requirements;predecessors;all of the above;Points Received: 2 of 2;Comments;Question 50. Question;Technically, to achieve Six;Sigma quality, there would have to be fewer than __________ defects per million;opportunities.;Student Answer: 6;166,667;667;67;3.4;Points Received: 2 of 2;Comments

 

Paper#38454 | Written in 18-Jul-2015

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