Hi Sean, The way I've got this to work previously is to have a project custom form on each project which contains a calculated field. The expression I have used in my field is: IF(ROUND(DATEDIFF(Planned Completion Date, Actual Completion Date),1)>1,"On Time","Late") Make sure you tick 'update previous calculations' You can then include this field in your project report as a new column and that will display if the project was late or on time. You can then group by this field and add a pie chart and show the results as a percentage: Max Nyirenda HomeServe