Exponential Smoothing

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Exponential Smoothing 이란 (Wiki)
한국어로 '지수 평활법' 이라고 한다.

In 'Exponential Smoothing' formula, we have 'Smooth constraint' called 'a' [alpha].

Condition 1: 0<a<1

Ft = a*Dt-1 + (1-a)Ft-1

Dt-1 : 직전 판매 실적
Ft-1 : 직전 수요 예측값

'직전 판매 실적' 에서 '직전 수요 예측값' 을 빼면 상수 'e'가 됨.
Dt-1 - Ft-1 = et-1

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