What is the Revenue Forecast Accuracy Factor?

At the bottom of the Dashboard summary, when you have been using the forecast for more than a month, it displays a Revenue Forecast Accuracy Factor.  This shows the percentage of actual revenue in comparison to your forecast 30 days before.  100% means the actual result was the same as your forecast.  After 3 months, another measure appears – 90 day accuracy factor.

If you hover the cursor over the result it shows the Revenue Forecast and Actual dollar values.