m202a - BA3352 : Midterm on 29 October 2002 - VERSION B...

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Unformatted text preview: BA3352 : Midterm on 29 October 2002 - VERSION B This is a closed textbook and lecture notes exam. You can use a calculator but also can leave quantities as fractions, additions or products. Do not forget to define any variables you introduce. Write your exam version on your scantron paper . Good luck. I declare that my conduct during the exam is entirely within the limits of the UTD regulations governing scholastic honesty -detailed in the handbook of operating procedures Title V Chapter 49. NAME (please print): ———————————————————————- Question Total possible Actual Q1 72 Q2 13 Q3 15 Total 100 Formulae: Forecasting: Exponential Smoothing. F t = αA t- 1 + (1- α ) F t- 1 Double Exponential Smoothing. F t = αA t- 1 +(1- α ) F t- 1 + T t- 1 where T t- 1 = β ( F t- 1- F t- 2 )+(1- β ) T t- 2 Variance Formula for random variable X : V ar ( X ) = ∑ N i =1 ( X i- ¯ X ) 2 N Linear regression: y n = a + bx n for N data points where b = N ∑ xy- ∑ x ∑ y N ∑ x 2- ( ∑ x ) 2 and a = ∑ y- b ∑ x N also r = N ∑ xy- ∑ x ∑ y q N ∑ x 2- ( ∑ x ) 2 q N ∑ y 2- ( ∑ y ) 2 Exponential lifetime random variable X with rate λ has density λe- λT at point T . Also P ( Lifetime ≤ T ) = 1- e- λT and P ( Lifetime ≥ T ) = e- λT . Minumum number of stations= ∑ t/CT Control charts: UCL = Average of Sample Means + z · StDev of Sample Means where we choose z so that Type I probability, denoted by α . For p-chart with sample size n StDev of Sample Mean = { ¯ p (1- ¯ p ) n } . 5 For c-chart StDev of Sample Mean = { Average of Sample Means } . 5 Let r be the number of runs in K samples: Expected value( r ) = 2 K- 1 3 StDev( r ) = { 16 K- 29 90 } . 5 Q1: Choose the most appropriate answer and mark your answer on the scantron paper. 1. The type of processing system that is used for complex jobs with unique sets of activities is: (a) continuous (b) intermittent (c) project (d) batch (e) mass C 2. In which type of operations are you likely to see minor variations in the product or service being produced using the same process and the same equipment? (a) a project (b) a job shop (c) repetitive production (d) batch processing (e) none of the above D 3. At the break-even point: (a) total cost is minimized (b) output equals capacity (c) total cost equals total revenue (d) total cost equals profit (e) total profit is maximized C 4. The type of layout which is used to achieve a smooth and rapid flow of large volumes of output is:4....
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This note was uploaded on 12/13/2011 for the course MANAGEMENT 103 taught by Professor Mr.singh during the Spring '11 term at Aristotle University of Thessaloniki.

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m202a - BA3352 : Midterm on 29 October 2002 - VERSION B...

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