We all have these projects were a bunch of excel sheets are made available to you by the business. “All the business logic is in there Have Fun” . Next you will spend days trying to figure out how stuff works. You can save a lot of time by using an excel plug in “trace” made by Christopher Teh Boon Sung: http://www.christopherteh.com/trace/.
It make great graphical overview on how all the cells are connected to each other. This can save you several days!
Till Next Time