Details of this Paper

SAINT GB334 FINAL EXAM

Description

solution


Question

Question;Question 1. 1.In a PERT network, the earliest;(activity) start time is the: (Points: 2);earliest time that an activity can be finished;without delaying the entire project;latest time that an activity can be started without;delaying the entire project;earliest time that an activity can start without;violation of precedence requirements;latest time that an activity can be finished without;delaying the entire project;none of the above;Question 2. 2.Given an activity's optimistic;most likely, and pessimistic time estimates of 4, 12, and 18 days respectively;what is the PERT variance for this activity? (Points: 2);2.33;5.44;8.00;64.00;None of the above;Question 3. 3.The expected time in PERT is;(Points: 2);a weighted average of the most optimistic time, most;pessimistic time, and four times the most likely time;the modal time of a beta distribution;a simple average of the most optimistic, most;likely, and most pessimistic times;the square root of the sum of the variances of the;activities on the critical path;none of the above;Question 4. 4.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, if the normal distribution were used to find the;probability of finishing this project in 24 weeks or fewer, what mean and;variance respectively would be used?;(Points: 2);20, 4.222;30, 5.222;20, 5.222;30, 4.222;22.667, 1.111;Question 5. 5.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 critical;path?;(Points: 2);A-B;A-C;B-D;A-B-C-D;None of the above;Question 6. 6.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 average number of people waiting to open;accounts? (Points: 2);3.27;4.16;5.27;5.83;Question 7. 7.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? (Points: 2);0.50;0.25;0.75;2.25;3.00;Question 8. 8.A widely used mathematical programming;technique designed to help managers and decision making relative to resource;allocation is called __________. (Points: 2);linear programming;computer programming;constraint programming;goal programming;None of the above;Question 9. 9.Consider the following linear;programming problem;Maximize 12X + 10Y;Subject to;4X + 3Y? 480;2X + 3Y? 360;all variables? 0;The maximum possible value for the objective;function is __________. (Points:2);360;480;1,520;1,560;none of the above;Question 10. 10.If items being transported must go;through an intermediate point before reaching a final destination, then this;situation is known as a(n) __________. (Points: 2);transshipment problem;assignment problem;transportation problem;intermediate point problem;None of the above;Question 11. 11.Which of the following is not a;popular definition of quality? (Points: 2);Quality is the totality of features and;characteristics of a product or service that bears on its ability to satisfy;stated or implied needs.;Quality is defined as a competitively priced product that surpasses customer;needs.;Quality is the degree to which a product conforms to design or specification.;Quality is fitness for use.;Even though quality cannot be defined, you know what it is.;Question 12. 12.Variations that usually occur in a;process are called __________. (Points: 2);process variations;natural variations;control variations;assignable variations;none of the above;Question 13. 13.A feasible solution to a linear;programming problem: (Points: 2);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.;Question 14. 14.Click;here to view a Word version of the table.;To guarantee that cans of soup are properly filled;some cans are sampled and the amounts measured. The overall average for the;samples is 12 ounces. Each sample contains 10 cans. The average range is 0.4;ounces.;Using the data in the table above, what is the lower;control chart limit for the sample averages? (Points: 2);12.1232;11.8768;13.2;12.308;None of the above;Question 15. 15.Which of the following control;charts is/are for attributes? (Points: 2);p-chart;x-bar chart;R-chart;A and B;A, B, and C;Question 16. 16.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? (Points: 2);1;2;3;4;Question 17. 17.Given the table below, the final;table for an assignment problem, who should be assigned to Job 2?;Click;here to view an Excel version of the table.;(Points: 2);Worker A;Worker C;Either worker A or worker C;Neither worker A nor worker C;Worker D;Question 18. 18.A company believes a process;monitored by an x-bar chart to be in control. When the most recent control;point exceeded the UCL value by 20%, the company should: (Points: 2);believe that a random bad luck chance occurred and;proceed.;suspect that an assignable cause of variation now exists and can be found.;ignore the control point completely, as it is simply an outlier.;wait for the next four samples to be taken to see if a trend develops.;none of the above.;Question 19. 19.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 lower;control chart limit for the sample averages? (Points: 2);36.3730;36.4849;35.6270;35.5150;Question 20. 20.Consider the following linear;programming model;Minimize 2X1 + 3X2;Subject to;X1 + X2? 4;X1? 2;X1, X2? 0;This linear programming model has: (Points: 2);a unique optimal solution.;an unbounded solution.;an infeasible solution.;an alternate optimal solution.;redundant constraints.;Question 21. 21.When using the shortest-route;technique, the second step is to: (Points: 2);find the next-nearest node to the origin and put the;distance in a box by the node.;trace the path from the warehouse to the plant.;determine the average distance traveled from source to end.;find the nearest node to the origin and put a distance box by the node.;None of the above is correct.;Question 22. 22.The shortest-route technique would;best be used to: (Points: 2);assign workers to jobs in the cheapest manner.;determine the number of units to ship from each source to each destination.;determine the amount of LAN network wiring within a building.;minimize the amount of traffic flow on a busy highway.;determine the path for a truck making frequent but repeatable drops.;Question 23. 23.The p-chart is useful when we;(Points: 2);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.;Question 24. 24. A finite population model differs;from an infinite population model because there is a random relationship;between the length of the queue and the arrival rate. (Points: 2);True;False;Question 25. 25.The wait time for a single-channel;system is more than twice that for a two-channel system using two servers;working at the same rate as the single server. (Points: 2);True;False;Question 26. 26.The maximal-flow technique finds the;maximum flow of any quantity or substance through a network. (Points: 2);True;False;Question 27. 27.Two characteristics of arrivals are;the line length and queue discipline. (Points: 2);True;False;Question 28. 28.The points on the network are;referred to as nodes. (Points: 2);True;False;Question 29. 29.In the maximal-flow technique, a;zero (0) means no flow or a one-way arc. (Points: 2);True;False;Question 30. 30.Infeasibility in a linear;programming problem occurs when: (Points: 2);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.;Question 31. 31. 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 W? (Points: 2);1;2;3;4;Question 32. 32.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. (Points: 2);True;False;Question 33. 33.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? (Points: 2);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;Question 34. 34.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? (Points: 2);0;4;17;16;None of the above;Question 35. 35.The customer who arrives at a bank;sees a long line, and leaves to return another time is __________. (Points: 2);balking;cropping;reneging;blithering;none of the above.;uestion 36. 36.Two models of a product ? Regular (X);and Deluxe (Y) ? are produced by a company. A linear programming model is used;to determine the production schedule. The formulation is as follows;Maximize profit = 50X + 60Y;Subject to;8X + 10Y? 800 (labor hours);X + Y? 120 (total units demanded);4X = 5Y? 500 (raw materials);all variables? 0;The optimal solution is X = 100, Y = 0.;How many units of the regular model would be;produced based on this solution? (Points: 2);0;100;50;120;None of the above;Question 37. 37.In PERT, we assume that: (Points;2);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.;Question 38. 38.The difference between the left-hand;side and right-hand side of a greater-than-or-equal-to constraint is referred;to as __________. (Points: 2);surplus;constraint;slack;shadow price;none of the above;Question 39. 39.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? (Points: 2);0.25;0.50;0.75;2.25;3.00;Question 40. 40.Which of the following is not an;assumption of LP? (Points: 2);Simultaneity;Certainty;Proportionality;Divisibility;Additivity;Question 41. 41.Practically speaking, multiple;optimal solutions __________. (Points: 2);are infeasible;are unbounded;are degenerate;are unbalanced;provide management with greater flexibility in selecting and using resources;Question 42. 42.Cars arrive at a local JLUBE;franchise at the rate of 1 every 12 minutes. Service times are exponentially;distributed with an average of 15 minutes. Jack Burns, the JLUBE owner, has;decided to open a second work bay, i.e., make the shop into a two-channel;system. Under this new scheme, the total time an average customer spends in the;system will be (Points: 2);37 minutes.;2.1 minutes.;9.6 minutes.;33.3 minutes.;24.6 minutes.;Question 43. 43.An automatic car wash is an example;of a constant service time model. (Points: 2);True;False;Question 44. 44.Customers enter the waiting line to;pay for food as they leave a cafeteria on a first-come, first-served basis. The;arrival rate follows a Poisson distribution, while service times follow an;exponential distribution. If the average number of arrivals is four per minute;and the average service rate of a single server is seven per minute, on;average, how much time will elapse from the time a customer enters the line;until he/she leaves the cafeteria? (Points: 2);0.67 minute;0.50 minute;0.75 minute;0.33 minute;1.33 minutes;Question 45. 45.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 X? (Points: 2);1;2;3;4;Question 46. 46.Which of the following is not a;property of all linear programming problems? (Points: 2);The presence of restrictions;Optimization of some objective;A computer program;Alternate courses of action to choose from;Usage of only linear equations and inequalities;Question 47. 47.Typical resources of an organization;include __________. (Points: 2);machinery usage;labor volume;warehouse space utilization;raw material usage;all of the above;Question 48. 48.Assume that we are using a waiting;line model to analyze the number of service technicians required to maintain;machines in a factory. Our goal should be to: (Points: 2);maximize productivity of the technicians.;minimize the number of machines needing repair.;minimize the downtime for individual machines.;minimize the percent of idle time of the technicians.;minimize the total cost (cost of maintenance plus cost of downtime).;Question 49. 49.The shortest-route technique might;be logically used for: (Points: 2);finding the longest time to travel between two;points.;finding the shortest travel distance between two points.;finding the most scenic route to allow travel to several places during a trip;on spring break.;connecting all the points of a network together while minimizing the distance;between them.;none of the above.;Question 50. 50.The c-chart is useful when we;(Points: 2);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

 

Paper#45605 | Written in 18-Jul-2015

Price : $57
SiteLock