The following are monthly actual and forecast demand levels for May through December for units of a product manufactured by the
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Answer:
Consider the following explanation
Explanation:
Please note that if cash requirements are combined, mean requirement of combined entity can be simply summed up, but same is not true for standard deviation as it is not additive.
So first we need to calculate the variance by taking square of SD, then we sum it for all the location to get variance of combined entity and then we take square root again to get the SD of combined entity.
Keep in mind that we can take a simple summation of variance due to the fact that requirement in different locations are independent of each other and their correlation coefficient is = 0.
Solution is given through following image sheet -
