* Bland ikke præcisions- og tidsniveauer . Sørg for , at tidsrammerne forstås korrekt . Undgå at have et diagram , der har sidste måned ud for filtrerede diagrammer fra en bestemt måned i året .

* Don ’ t mix levels of precision and time . Make sure that time frames are well understood . Don ’ t have one chart that has last month next to filtered charts from a specific month of the year .
