The following table gives the number of pints or type a Blood used at damascus h

Question

The following table gives the number of pints or type a Blood used at damascus hospital in the past 8 weeks. The forecasted demand for the week of October 12 using a 3-week moving average = 377.33 pints (round your response to two decimal places). Using a 3-week weighted moving average, with weights of 0.15, 0.30, and 0.55, using 0.55 for the most recent week, the forecasted demand for the week of October 12 = pints (round your response to two decimal places and remember to use the weights in appropriate order - the largest weight applies to most recent period and smallest weight applies to oldest period.)

Explanation / Answer

a) Under the three period moving average method, actual results of the past 3 periods are added and average is calculated by dividing them with 3.

So, October 12 forecast under this method =( September 21 + September 28 + October 5 ) / 3

= (383 + 371 + 378) / 3 = 377.33 pints

b) Under the weighted moving average method, in place of dividing the total of the periods by the number of periods, a weight is provided for each period and the respective data is multiplied by the weights to arrive at the weighted moving average forecast.

So, as per weighted moving average method taking 0.55 as weight for the most recent period and 0.15 as the weight for the oldest period, the forecast for week of October 12

= 0.15 x 383 + 0.30 x 371 + 0.55 x 378

= 376.65 pints

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