I have been successful by using multiple expressions each applying a set that limits the data to a single Division but this is not very flexible and challenging for representing more than just a very few Divisions.
Ideally I would produce a Line Graph with several lines each representing a different Division and plotting a defect % accross days. Really want to allow the user to select a subset of Divisions.
The range sum calculates an expression nicely but to try and graph this is the challenge. What I would like to have is Days on the x-axis, % Defects (0 - 100%) on the y-axis and separate curves showing the accumulations by Division.