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  • Consider the simplified scenario for the development of a consumer product through the market test phase shown in the table below.(Solved)

    Consider the simplified scenario for the development of a consumer product through the market test phase shown in the table below. pdt120220191050.png a) Draw the network for this project. b) Calculate the slacks and interpret their meaning. c) Determine the critical path and interpret its meaning. d) Construct a time chart and identify scheduling flexibilities

    Date posted: February 20, 2019.  

  • Consider the two person zero sum game between players A and B given by the following pay-off table:(Solved)

    Consider the two person zero sum game between players A and B given by the following pay-off table: zerosum23120191154.png Required: i) Using the maximin and minimax values, is it possible to determine the value of the game? Give reasons. ii) Use graphical methods to determine optimal mixed strategy for player A and determine the value of the game.

    Date posted: January 23, 2019.  

  • Define the following terms used in game theory: i) Dominance. ii) Saddle point iii) Mixed strategy iv) Value of the game(Solved)

    Define the following terms used in game theory: i) Dominance. ii) Saddle point iii) Mixed strategy iv) Value of the game

    Date posted: January 23, 2019.  

  • Explain the following terms as used in decision analysis. a) Decision making under risk versus uncertainty. b) Decision trees versus probability trees. c) Minimax versus maximax criterion. d) Pure...(Solved)

    Explain the following terms as used in decision analysis. a) Decision making under risk versus uncertainty. b) Decision trees versus probability trees. c) Minimax versus maximax criterion. d) Pure strategy versus mixed strategy games. e) Games with more than two persons versus non zero-sum games

    Date posted: January 23, 2019.  

  • An urban cable television company is investigating the installation of cable TV system in urban areas. The engineering department estimates the cost of the system...(Solved)

    An urban cable television company is investigating the installation of cable TV system in urban areas. The engineering department estimates the cost of the system (in present worth Sh.) to be Sh. 7 million. The sales department has investigated four pricing plans. For each pricing plan, the marketing division has estimated the revenue per household in present worth Sh. to be: urbancable23120191143.png

    Date posted: January 23, 2019.  

  • A trust officer for a major banking institution is planning the investment of a USD 1 million family trust for the coming year. The trust...(Solved)

    A trust officer for a major banking institution is planning the investment of a USD 1 million family trust for the coming year. The trust officer has identified a portfolio of stocks and another group of bonds that might be selected for investment. The family trust can be invested in stocks or bonds exclusively, or a mix of the two. This trust officer prefers to divide the funds in increments of 10 percent; that is, the family trust may be split 100 percent stocks /0 percent bonds, 90 percent stocks /10 percent bonds, 80 percent stocks /20 percent bonds, and so on. The trust officer has evaluated the relationship between the yields on the different investments and general economic conditions. Her judgment is as follows: 1) If the next year is characterized by solid growth in the economy, bonds will yield 12 percent and stocks 20 percent. 2) If the next year is characterized by inflation, bonds will yield 18 percent and stocks 10 percent. 3) If the next year is characterized by stagnation, bonds will yield 12 percent and stocks 8 percent. a) Formulate a payoff table where payoffs represent the annual yield, in dollars, associated with the different investment strategies and the occurrence of various economic conditions b) Determine the optimal investment strategy using the max-max, max-min, Hurwicz (alpha23120191129.png), equally likely, and regret criteria. c) Suppose that a leading economic forecasting firm projects P(solid growth)= 0.4, P(inflation)=0.25, and P (stagnation)= 0.35. Use the expected value criterion to select the appropriate strategy. d) What is the expected value with perfect information?

    Date posted: January 23, 2019.  

  • The following table is a payoff table for a particular venture. (Solved)

    The following table is a payoff table for a particular venture. payoff23120191121.png Required: a) Determine the decision alternative that maximizes expected payoff. b) Determine expected value under certainty. c) What is the expected value of perfect information?

    Date posted: January 23, 2019.  

  • The following is a payoff table for a particular venture.(Solved)

    The following is a payoff table for a particular venture. playoff2312019923.png Determine the optimal decision using: a) Max-min criterion. b) Max-max criterion. c) Min-max regret criterion. d) Maximum expected payoff (assuming equal likelihood of states of nature).

    Date posted: January 23, 2019.  

  • Downtown Motors Company (DMC), has hired a market services firm to develop an advertising strategy for promoting Downtown?s used car sales. The marketing firm has recommended...(Solved)

    Downtown Motors Company (DMC), has hired a market services firm to develop an advertising strategy for promoting Downtown's used car sales. The marketing firm has recommended that Downtown uses pot announcements on both television and radio as the advertising media for the proposed promotional campaign. Advertising strategy guidelines are expressed as follows: 1. Use at least 30 announcements for combined television and radio coverage. 2. Do not use more than 25 radio announcements. 3. The number of radio announcements cannot be less than the number of television announcements. The television station has quoted a cost of Sh.1,200 per spot announcement and the radio station has quoted a cost of Sh.300 per spot announcement. Downtown‟s advertising budget has been set at Sh.25,500. The marketing services firm has rated the various advertising media in terms of audience coverage and recall power of the advertisement. For Downtown‟s media alternatives, the television announcement is rated at 600 and the radio announcement is rated at 200. Required: Perform an analysis of advertising strategy for DMC. Include a consideration of the following items: i) Determine the optimal number of television and radio spot announcements. ii) Explain the relative merits of each advertising medium. iii) Determine the rating that would be necessary in order to increase the number of television spots. iv) Which restrictions placed on the advertising strategy would DMC want to consider relaxing or altering? Why? v) What is the use of any possible increase in the advertising budget?

    Date posted: January 23, 2019.  

  • Briefly and clearly compare and contrast between a transportation problem and an assignment problem as used in linear programming.(Solved)

    Briefly and clearly compare and contrast between a transportation problem and an assignment problem as used in linear programming.

    Date posted: January 23, 2019.  

  • The Copper Wire Company is a manufacturer of copper wires. Ben Muturi, the company executive director has just received a memo from Stella Musingo, one of...(Solved)

    The Copper Wire Company is a manufacturer of copper wires. Ben Muturi, the company executive director has just received a memo from Stella Musingo, one of his young engineers. Stella informs Ben that; with the forthcoming purchase of new blast furnace to produce copper, it seems an opportune time to completely review their method of producing copper. Currently, a variety of ingredients are entered into the blast furnace in order to produce copper. The production manager, Joe Kiilu makes the decision, as he has for the last 25 years, on the variety of ingredients. It is not an easy decision. The company wants to keep the costs of producing copper down The ingredients into the blast furnace have to interact to produce copper. Furthermore, the chemical reactions have to be such that the copper produced is viscous enough to flow out of the furnace. Stella has identified the problems with the current method. First, Joe is retiring in six months and there is no obvious replacement to him. Second, the company never knows if they are minimizing the production costs. Third, sometimes the furnace does not freeze-up. Stella believes that there is a quantitative technique, which can be used to decide what ingredients to enter in to the furnace. Once the model has been developed, special skills such as Joe‟s will no longer be required. The company will also be confident that they are minimizing costs. In addition, they would be able to eliminate the furnace freeze-up problem Required: i) What potential quantitative technique can be used to solve this problem? Why? ii) Specify the general formulation of the quantitative technique. (Be sure to clearly spell out the meaning of all the variables or parameters used) iii) If a group were formed to develop an appropriate model, what organizational personnel should be included? What specific skills would each provide?

    Date posted: January 23, 2019.  

  • Explain and graphically show the following terms as used in linear programming: i) Alternate optimal or multiple solutions ii) Unbound solutions iii) Infeasible solutions(Solved)

    Explain and graphically show the following terms as used in linear programming: i) Alternate optimal or multiple solutions ii) Unbound solutions iii) Infeasible solutions

    Date posted: January 23, 2019.  

  • Kenya Canning Transport is to move goods from three factories situated in Thika, Naivasha and Machakos. These goods will be distributed to Nairobi, Mombasa and Kisumu....(Solved)

    Kenya Canning Transport is to move goods from three factories situated in Thika, Naivasha and Machakos. These goods will be distributed to Nairobi, Mombasa and Kisumu. Information about the units (in kilograms) to be moved is given below: kenyacanning1412019949.png Required: i) Draw a network diagram for the above problem ii) Set a linear programming model for this problem NOTE: Do not solve.

    Date posted: January 14, 2019.  

  • Explain the following terms as used in the context of linear programming: i) Linear program ii) Basic feasible solution iii) Degeneracy iv) Alternative optimal solutions v) Redundant constraints vi) Range of...(Solved)

    Explain the following terms as used in the context of linear programming: i) Linear program ii) Basic feasible solution iii) Degeneracy iv) Alternative optimal solutions v) Redundant constraints vi) Range of optimality vii) Artificial variables viii) Reduced cost ix) Dummy destination x) Assignment problem

    Date posted: January 14, 2019.  

  • An extract of the output from a computer package for this problem is given below: Output solution(Solved)

    An extract of the output from a computer package for this problem is given below: Output solution extract1412019945.png Required: i) Interpret the output clearly, including optimum product mix, monthly profit, unused resources and dual values ii) Explain the purpose of upper limits and lower limits for the variables X1,X2,X3 and constraints 1 to 5. iii) Calculate the increase in profit if the company is able to produce a further 10 CPU 80386 chips.

    Date posted: January 14, 2019.  

  • J.A Computers is a small manufacturer of personal computers. It concentrates on production of three models- a Desktop 386, a Desktop 286, and a Laptop 486,...(Solved)

    J.A Computers is a small manufacturer of personal computers. It concentrates on production of three models- a Desktop 386, a Desktop 286, and a Laptop 486, each containing one CPU Chip. Due to its limited assembly facilities JA Computers are unable to produce more than 500 desktop models or more than 250 Laptop models per month. It has one hundred and twenty 80386 chips (these are used in Desktop-386) and four hundred 80286 chips (used in desktop 286 and Laptop 486) for the month. The Desktop 386 model requires five hours of production time, the Desktop 286 model requires four hours of production time, and the Laptop 486 requires three hours of production time. J.A Computers have 2000 hours of production time available for the coming month. The company estimates that the profit on Desktop 386 is Sh. 5,000. for a desktop 286 the profit is Sh.3,400 and Sh.3,000 profit for a laptop 486. Required: Formulate this problem as a profit maximization problem and mention the basic assumptions that are inherent in such models.

    Date posted: January 14, 2019.  

  • Explain the value of sensitivity analysis in linear programming problems and show how dual values are useful in identifying the price worth paying to relax constraints.(Solved)

    Explain the value of sensitivity analysis in linear programming problems and show how dual values are useful in identifying the price worth paying to relax constraints.

    Date posted: January 14, 2019.  

  • The TamuTamu products company ltd is considering an expansion into five new sales districts. The company has been able to hire four new experienced salespersons. Upon...(Solved)

    The TamuTamu products company ltd is considering an expansion into five new sales districts. The company has been able to hire four new experienced salespersons. Upon analysing the new salesperson's past experience in combination with a personality test which was given to them, the company assigned a rating to each of the salespersons for each of the districts .These ratings are as follows: tamutamu1412019930.png The company knows that with four salespersons, only four of the five potential districts can be covered. Required: i) The four districts that the salespersons should be assigned to in order to maximize the total of the ratings ii) Maximum total rating.

    Date posted: January 14, 2019.  

  • Define the following terms as used in linear programming: i) Feasible solution ii) Transportation problem iii) Assignment problem(Solved)

    Define the following terms as used in linear programming: i) Feasible solution ii) Transportation problem iii) Assignment problem

    Date posted: January 14, 2019.  

  • a) A small company will be introducing a new line of lightweight bicycle frames to be made from special aluminium alloy and steel alloy. The frames...(Solved)

    a) A small company will be introducing a new line of lightweight bicycle frames to be made from special aluminium alloy and steel alloy. The frames will be produced in two models, deluxe and professional. The anticipated unit profits are currently Sh.1,000 for a deluxe frame and Sh.1,500 for a professional frame. The number of kilogrammes of each alloy needed per frame is summarized in the table below. A supplier delivers 100 kilogrammes of the aluminium alloy and 80 kilogrammes of the steel alloy weekly. -------------Aluminium alloy---Steel alloy Deluxe--------2----------------3 Professional--4----------------2 Required: i) Determine the optimal weekly production schedule. ii) Within what limits must the unit profits lie for each of the frames for this solution to remain optimal? b) Explain the limitations of the technique you have used to solve part (a) above.

    Date posted: January 11, 2019.  

  • a) A baker makes two products; large loaves and small round loaves. He can sell up to 280 of the large loaves and up to 400...(Solved)

    a) A baker makes two products; large loaves and small round loaves. He can sell up to 280 of the large loaves and up to 400 small round loaves per day. Each large loaf occupies 0.01m3 of shelf space, each small loaf occupies 0.008m3 of space, and there is 4m3 of shelf space available. There are 8 hours available each night for baking, and he can produce large loaves at the rate of 40 per hour, and small loaves at the rate of 80 per hour. The profit on each large loaf is Sh.5.00 and Sh.3.00 profit on the small round loaf. Required: In order to maximize profits, how many large and small round loaves should he produce? b) Summarize the procedure for solving the kind of quantitative technique you have used to solve part (a) above.

    Date posted: January 11, 2019.  

  • Regal Investments has just received instructions from a client to invest in two shares; one an airline share, the other an insurance share. The total...(Solved)

    Regal Investments has just received instructions from a client to invest in two shares; one an airline share, the other an insurance share. The total maximum appreciation in share value over the next year is to be maximized subject to the following restrictions: - the total investment shall not exceed Sh.100,000 - at most Sh.40,000 is to be invested in the insurance shares - quarterly dividends must total at least Sh.2,600 The airline share is currently selling for Sh.40 per share and its quarterly dividend is Sh.1 per share. The insurance share is currently selling for Sh.50 per share and the quarterly dividend is Sh.1.50 per share. Regal's analysts predict that over the next year, the value of the airline share will increase by Sh.2 per share and the value of the insurance share will increase by Sh.3 per share. A computer software provided the following part solution output: Objective Function Value = 5,400 regal1112019924.png Required: a) Formulate the above problem. b) Explain what reduced cost and dual prices columns above mean. c) How should the client‟s money be invested to satisfy the restrictions? d) Suppose Regal‟s estimate of the airline shares appreciation is an error, within what limits must the actual appreciation lie for the answer in (c) above to remain optimal?

    Date posted: January 11, 2019.  

  • An endowment fund manager is attempting to determine a “best” investment portfolio and is considering six alternative investments. The following table indicates point estimates for the...(Solved)

    An endowment fund manager is attempting to determine a “best” investment portfolio and is considering six alternative investments. The following table indicates point estimates for the price per share, the annual growth rate in the price per share, the annual dividend per share, and a measure of the risk associated with each investment. endowment1112019.png endowment1112019b.png

    Date posted: January 11, 2019.  

  • A pension fund wishes to invest in one or more of six possible investments. Financial analysts have estimated the present value of effective annual estimate....(Solved)

    A pension fund wishes to invest in one or more of six possible investments. Financial analysts have estimated the present value of effective annual estimate. The data in this table indicate that the present value of investing USD 10,000 in alternative 1 is the sum of USD 1,200 (0.12 x USD 10,000) for year 1, USD 1,000 (0.10 x 10,000) for year 2, and USD 800 (0.08 x USD 10,0000 for year 3, for a total present value of USD 3,000. pension1112018859.png Management has decided that USD300,000 will be invested. At least USD50,000 is to be invested in alternative 2 and no more than USD40,000 in alternative 5. Total investment in alternative 4 and 6 should not exceed USD75,000, as these are risky investments. If the objective is to maximize the present value of total dollar return for the three-year period, formulate the LP model for how much capital to invest in each alternative. Can you comment on how relevant each underlying LP assumption is to this problem?

    Date posted: January 11, 2019.  

  • A company wishes to purchase additional machinery in a capital expansion program. Three types of machinesare to be purchased: A, B, and C. Machine A...(Solved)

    A company wishes to purchase additional machinery in a capital expansion program. Three types of machines are to be purchased: A, B, and C. Machine A costs USD 25,000 and requires 200 square feet of floor space for its operation. Machine B costs USD 30,000 and requires 250 square feet of floor space. Machine C costs USD 22,000 and requires 175 square feet of floor space. The total budget for this expansion program is USD 350,000. The maximum available floor space for the new machines is 4,000 square feet. The company also wishes to purchase at least one of each machine. Given that machines A, B, and C can produce 250, 260, and 225 pieces per day, the company wants to determine how many machines of each type it should purchase so as to maximize daily output (in units) from the new machines. a) Explicitly define your decision variables and formulate the LP model. b) Assess the validity of the four underlying LP assumptions for this problem. c) Solve and analyse the problem using a computer package

    Date posted: January 11, 2019.  

  • Solve the following problem using the simplex method:(Solved)

    (a) Solve the following problem using the simplex method: simplex1112019759.png b) Verify your solution by solving graphically and relate tableaux to specific corner points. c) Determine the shadow prices and interpret their meaning.

    Date posted: January 11, 2019.  

  • The number of plumbing repair jobs by Manji Plumbing Service in each of the last nine months in Nakuru town are listed below: Month---Jobs March 353 April 387 May 342 June...(Solved)

    The number of plumbing repair jobs by Manji Plumbing Service in each of the last nine months in Nakuru town are listed below: Month---Jobs March 353 April 387 May 342 June 374 July 396 August 409 September 399 October 412 November 408 Required: Required: a) i) Forecast the number of repair jobs Manji Plumbing Service will perform in December. Use the least squares method. Note: manji1112029752.png ii) What is your forecast for December using a three-period weighted moving average with weights of 0.6, 0.3, and 0.1. How does it compare with your forecast from part (i) above? b) i) What are the aims of time series analysis? ii) Describe what a season is in the context of a time series and give some examples. iii) Describe the stages in obtaining a time series trend using the method of semi averages. iv) Why must forecasts be treated with caution?

    Date posted: January 11, 2019.  

  • Find the moving average of the time series of quarterly production (in tons) of coffee in an Indian State as given below. After that, come...(Solved)

    Find the moving average of the time series of quarterly production (in tons) of coffee in an Indian State as given below. After that, come up with a trend line to approximate the production in future. Production (in Tons) movingaverage1112019.png

    Date posted: January 11, 2019.  

  • As a tax consultant to the Government of your country, you have been asked to estimate an empirical model on the demand for income tax evasion...(Solved)

    As a tax consultant to the Government of your country, you have been asked to estimate an empirical model on the demand for income tax evasion (ITE) in the country. You think true income (TI), Marginal tax rate (MTR), penalty rate (PR) and probability of detection (PROB) will be important variables. Using national time-series annual data from 1967 to 1995, you estimate the following regression equation: ite1012019.png The calculated t – statistics are reported in parentheses, and figures are in shillings. Required: i) Write down the population theoretical empirical model on the demand for income tax evasion (ITE). ii) Provide a theoretical justification of the empirical model specification in (i) above, that is, expected signs of the regression coefficients and why. iii) Interpret the constant term (-52.59), coefficient for true income (33.44) and coefficient of probability of detection (-1.48) in the context of the problem. iv) Before collecting data, the principal tax collector and her staff believed that penalty rate had a negative influence on income tax evasion and should therefore be used as leverage on those who evade tax. From the regression results, should this be the case? Why? (Note: critical t-value = - 1.701 at 0.05 level of significance)

    Date posted: January 10, 2019.  

  • Briefly but clearly, explain the difference, if any, between regression analysis and correlation analysis.(Solved)

    Briefly but clearly, explain the difference, if any, between regression analysis and correlation analysis.

    Date posted: January 10, 2019.