RCAXPress Fishbone Diagram Builder is a powerful tool to dynamically create fishbone diagrams (aka ishikawa diagrams) in a WindowsB. desktop environment. RCAXPress real-time fishbone generator takes the difficult challenge of drawing fishbone diagrams to a level of ease never before seen. You simply enter the probable causes and RCAXPress does the rest. To permit you to be more productive, we have created an advanced WYSIWYG probable cause ask-why editor.