Harlen Industries has a simple forecasting model: Take theactual demand for the same month last year and divide that by thenumber of fractional weeks in that month. This gives the averageweekly demand for that month. This weekly average is used as theweekly forecast for the same month this year. This technique wasused to forecast eight weeks for this year, which are shown belowalong with the actual demand that occurred. The following eightweeks show the forecast (based on last year) and the demand thatactually occurred: WEEK FORECAST DEMAND ACTUAL DEMAND 1 130 127 2132 123 3 140 145 4 140 155
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