The lack of an email arrival during a particular time period indicates to the model that
an email arrival during this time period is impossible. In order to allow for the possibility
of email arrivals during those time periods when no email arrivals were specified, each
arrival rate is multiplied by 0.9, and 10% of daily arrivals of a particular type of email (one
row in the worksheet above) is redistributed across all time periods. These calculations are
done within a second worksheet of the Excel workbook. The following example illustrated
in Figure 13 explains this further.
.