For ideas on LabVIEW program design, there are a couple good articles on the Development Tools and Guildlines page of NI Developer Zone. Rules to Wire By, LabVIEW Application Design Patterns, and LabVIEW Programming Techniques - The Good, The Bad, and the Ugly should all be looked at. LabVIEW Development Guildlines is a pdf file that's part of the shipping documentation. There are numerous generic reference works on software design. I happen to use Visio for documenting my designs. It has all of the normal flowchart symbols and dataflow symbols that work great. If you're using LabVIEW 7, NI just introduced the LabVIEW State Diagram Toolkit. You design your VI as a state diagram and then it generates the code for you.
