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Operations Management Planning Background Information (Continued) Forecast Errors All forecasts are subject to error. Understanding the nature and size of errors is important to making good decisions. Forecast error is the difference between the observed value of the time series and the forecast, or At - Ft. Take a look at the table seen in the chart below. Suppose that a forecasting method provided the forecasts in column E of the sample chart. The forecast errors are computed in column F. Because of the inherent inability of any model to forecast accurately, we use quantitative measures of forecast accuracy to evaluate how well the forecasting model performs. Clearly, we want to use models that have small forecast errors. Generally, three types of forecast error metrics are used: Mean square error (MSE), Mean absolute deviation (MAD) and Mean absolute percentage error (MAPE).
Finally, what possible explanations do you think exist for changes in the position of the Phillips Curve over time?
Community Hospital wants to buy equipment for $30,000 with projected cash flows of $7,000 per year during the equipment's six-year useful life.
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