By using the level production planning strategy, variation in demand is met by: Changing output rates monthly Production costs Varying output rate during regular time by changing employment levels Price adjustments to encourage promotion Using combination of inventories, back orders and shortages Evidence of what type of characteristic of demand is going on with this forecast model: Cycle Trend Causal relationship Seasonality Average By using the level production planning strategy, variation in demand is met by: Changing output rates monthly Production costs Varying output rate during regular time by changing employment levels Price adjustments to encourage promotion Using combination of inventories, back orders and shortages In conducting aggregate operations planning there are a number of required inputs. Which of the following are inputs considered external to the firm? Availability to get inventory from suppliers and competitors behavior Current physical capacity and market demand Subcontractor capacity and inventory levels Current workforce and economic conditions Inventory levels and market demand