Bias is: Time series forecasting A forecasting model Judgement error in over and under forecasting Always long term in nature The main purpose of Sales and Operations Planning, and then Aggregate Planning, is to try to determine the optimal combination of which of the following: The strategic plan and the products being sold Operational costs and cash flow to support operations The workforce level and the degree of automation Inventory on hand and financing costs for that inventory Production rates, workforce levels and inventory on hand by product group Tequila has become a more popular alcohol in the past 2-3 years. This is an example of a: Seasonality and random variation Fashion Trend Random variation Cycle