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Using Probability Concepts to Formulate a Decision Making for ABC - Case Study Example


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Using Probability Concepts to Formulate a Decision Making for ABC

This has resulted in the futures price for corn in December 2013 varying between 5.63 and 7.43. The lower yield means higher prices for producers and in some cases losses or lower profitability levels.ABC Ltd currently produces corn, the majority of which (approximately 95%) is supplied to a major customer. The cost of production is currently close to the contracted price and ABC Ltd is considering the possibility of sourcing the product at a cheaper price as there is a 0.85 probability that the price will be higher than $6.46. There is a 0.9 probability that it can be sourced in another State. However, Michigan State University (2013) indicates that there is a 0.5 probability that the futures price will be less than or equal to $6.46 – the price above which ABC would not consider purchasing corn. ABC needs to know what the best option will be as the company will go out of business if the cost of production is not reduced. If ABC cannot deliver based on the contract there is a penalty attached. Additionally, ABC may not be able to find any additional customers as the market is very competitive Bayes’s Theorem can be used to solve this problem. Bayes’s Theorem provides a method that uses probabilities to arrive at new information. In this scenario the joint probabilities are calculated as shown in the Tree Diagram in Appendix 1 and Bayes’s Theorem is then used to determine the best option. Tree Diagrams are very useful in Illustrating conditional and joint probabilities (Mason and Lind

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1997). The diagram shows the prior probability of sourcing corn instead of manufacturing it. The prior probability is the initial probability which is based on the information gathered in the initial stages and which does not have an empirical basis (Mason and Lind 1997). The conditional probability is so termed because its value is dependent on whether the price is high (expensive) or low (cheap).In this case a high price is greater than $6.46 and a low price is less than or equal to $6.46. The joint probability is product of the Prior and Conditional Probability. It is calculated as 0.45 and 0.015 respectively. The posterior probability can then be calculated using Bayes’s Theorem. It is a revised probability which is based on the additional information received. The additional information was the price of corn futures. (See information from Michigan State University 2013). In applying Bayes’s Theorem, the probability that corn can be sourced cheaply is given by the following: P(S/C) = [P(C/S)P(S)] /[P(C/S)P(S)] + /[P(C/M)P(M)] = [(0.5)(0.9)]/[(0.5)(0.9) + (0.15)(0.1) = 0.45/(0.45 + 0.015) =0.45/0.465 = 0.97 This result indicates that the probability of sourcing corn cheaply is 0.97. The probability of obtaining a cheap price sourced or manufactured is summarized in the table below. Event A Prior Probability, P(A1) Conditional Probability (B1/A1) Joint Probability P(A1 and B1) Posterior Probability Sourced .90 0.50 0.45 0.45/0.465 = 0.97 Manufactured .10 0.15 0.015 0.015/0.465 = 0.03 P(B1) = 0.465 1.000 Table – Summary of Probabilities This Table has similar information to that contained in the Tree Diagram in the Appendix. It is proof that the calculation is correct as the posterior probability of both events equate to 1.000. Conclusion Bayes’s Theorem is a means of using probability theory to solve problems and make important decisions for businesses. In ABC’s case it has provided a means by which decisions can be informed. The information generally reveals that there is a high probability – 0.97% of obtaining corn cheaply. This is especially so if the corn is sourced in another state
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Corn production is affected by extreme weather conditions as corn requires warm weather when it is sown. In the past few years farmers have experienced severe weather conditions in the planting and growing season…
Using Probability Concepts to Formulate a Decision Making for ABC
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