 As the inventor of SADT, Structured Analysis and Design Technique, Ross was an early developer of structured analysis methods.During the 1970s, along with other contributors from SofTech, Inc., Ross helped develop SADT into the IDEF0 method for the Air Force's Integrated Computer-Aided Manufacturing (ICAM) program's IDEF suite of analysis and design methods.He was a member of the IEEE IDEF0 Working Group which produced the IEEE IDEF0 standard in 1998.