a$.$ In the production planning process, forecast uncertainty generally has a meaning that the actual demand behavior is likely to be different from the forecasted demand. It also could mean that updated forecasts of future demands are different from earlier forecasts of those demands. As a production planning department manager, what should be your reaction alternatives for the demand uncertainty? $(5$ Pts$)$

b$.$ One condition that must be fulfilled for the hierarchy of planning levels to work properly is that decisions at one planning level must be made within the limits of decisions taken at the planning level above. What may be the result be if activities on the order planning level are outside the limits of decisions taken on the master production schedule level? $(5$ Pts$)$