2.4.I Preliminary Time series methods are most appropriate when future demand is related to historical demand,growth patterns,and any seasonal patterns There is always a random element that cannot be explained by historical demand patterns. SEIEE AU406 Supply Chain Management 92.4.1 Preliminary  Time series methods are most appropriate when future demand is related to historical demand, growth patterns, and any seasonal patterns  There is always a random element that cannot be explained by historical demand patterns. SEIEE AU406 Supply Chain Management 9