I and many of my associates have been using Quad of Aims tool for many years, having first encountered it in the 1980's whilst working at GEC telecommunications or it's successor GPT.
After such a long time, origins get blurred. To date, I have considered the Quad of Aims origin in the same way as the music author - "Trad".
Having promoted the Quad of Aims use, via this blog, It's creator has just been in touch. I can now attribute it's origin as the Coverdale Organisation Ltd.
Do-little continues to collect and share best practice - "Quad of Aims" is one of the best.