Actuals, Forecasts, and Errors

Actual and Forecast

Tracking signal starts with fixed retrospective actual and forecast rows.

highlighted = computed this step

Retrospective Row

The first row has actual 20 and forecast 18.

actual and forecast are fixed inputs\text{actual and forecast are fixed inputs}
Actual and forecast rowsThe retrospective rows are fixed actual and forecast values.actual and forecast rowsactualforecastperiod one2018period two2221period three2122period four2523

Not Future Proof

These rows are retrospective; they do not prove future accuracy.

retrospective score, not future proof\text{retrospective score, not future proof}
Actual and forecast rowsThe retrospective rows are fixed actual and forecast values.actual and forecast rowsactualforecastperiod one2018period two2221period three2122period four2523