Patent ID: 8280757

Claim:
A computer-implemented demand forecast method for use in a computer, wherein the computer is programmed to perform the steps of inputting historical forecast data of a target planning bucket to a Grey forecast model to calculate two forecast values for the target planning bucket; forming a forecast error interval according to the two forecast values by the computer; adjusting a target forecast value of the target planning bucket by the computer according to a distance between the forecast error interval and a benchmark, wherein the target forecast value is adjusted according to ATFV=TFV×(1−(s 1 ×FEI))×(1−(s 2 ×D)) when the forecast error interval is above the benchmark, and is adjusted according to ATFV=TFV×(1+(s 1 ×FEI))×(1+(s 2 ×D)) when the forecast error interval is under the benchmark, wherein TFV is the target forecast value, ATFV is the adjusted target forecast value, FEI is the forecast error interval, D is the distance between the forecast error interval and the benchmark, s 1 and s 2 are adjustable constants.