There are five basic measures of forecast error: CFE, MSE, 1s2, MAD, and MAPE. Figure 8.2 showsthe output from the Error Analysis routine in Forecasting’s dropdown menu of POM for Windows. Part(a) gives a big picture view of how well the forecast has been tracking the actual demand. Part (b) showsthe detailed calculations needed to obtain the summary error terms. Finally, Part (c) gives the summaryerror measures summarized across all 10 time periods, as derived from Part (b).