Keywords
Industrial Engineering, Supply Chain Management, Demand Planning Methodology, Winter Model, Forecasting.
1. Introduction
1.1. Variability of Demand:
Demands for any products changes rapidly from period to period, often due to predictable influence. These influences include seasonal factors that affect products, as well as non-seasonal factors (e.g. Promotional or product adoption rates) that may cause large, predictable increases and decline in sales. Predictable variability is change in demand that can be forecasted. Products that undergo this type of change in demand cause numerous problems in the supply chain, ranging from high levels of stockouts during peak demand periods to high levels of excess inventory during periods of low demand. These problems increase the costs and decrease the responsiveness of the supply chain. Supply and demand management have the greatest impact when it is applied to predictably variable products.
Supply chain can influence demand by using pricing and other