If we want to have Service Level that 96% or opportunity that customers buy goods and not because of หมดอ in 4% we should Stock. The goods much.From the chart above, the product A lack Stock that 4% (100 - 95.4 ~ 4%) at the mean + 2SD.Or 100 + 50x2 = 200 pieces per month, so if we want to Service 96% Level that we need to be Stock A goods at the 200 pieces per month.
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