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In: Operations Management

IV. The number of plumbing repair jobs performed by Augur’s Plumbing Service in each of the...

IV. The number of plumbing repair jobs performed by Augur’s Plumbing Service in each of the last nine months is listed below.

Month             Jobs    

August            353

September       367

October           372

November       387

December        396

January            409

February          399

March              412

April                428

  1. Assuming a linear trend function, forecast the number of repair jobs Augur’s will perform in May using the trend (least squares) method.
  2. What is your forecast for May using a three-period weighted moving average in which the weights are .6, .3 and .1?
  3. Which method, a or b, gives the better forecast? Explain why.

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