Fig. 12.1.17 Data marts typically contain multiple KPIs.There are lots of reasons to measure KPIs on a monthly basis. One value is the ability to
spot trends as the trends are happening.
There is a problem with spotting trends on KPIs on a monthly basis, and that problem is
that many KPIs are seasonal. By looking at a month-by-month trend line, the trend may
not be accurate. To spot seasonal trends, it is necessary to have a measurement of KPIs
over multiple years, as seen in Fig. 12.1.18.
Chapter 12.1: Operational Analytics