Consider the following data. We want to monitor the forecasts. Period Demand Forecasts 1 270 -- 2 256 270 3 286 256 4 294 286 5 311 294 Calculate the UCL and LCL for the appropriate control chart to control magnitude of errors? Calculate the cumulative error, MAD, and tracking signals of periods 2 through 5 and determine if the forecasts are biased. Keep two decimal places in your calculations. Period Errors Cumulative Errors MADS 1 Tracking Signals 2 3 4 5 www Are forecast errors biased? (Yes/No)