Yours were the first turtle diagrams I have seen. I did not know what they were (where did I get my CQE??). So see?? All of us learn everyday. So, I really can't comment on your turtle diagrams. They really look nice, and should probably make up one component of your toolset.
Turtles were 'invented' by Phil Crosby, in the 'good old days' of TQM. In recent years, Plexus Training has resurrected them as a tool to help in retraining disadvantaged QS-9000 (read element based) external auditors to prepare and think 'Process', as required to do a TS audit. IMHO, they didn't realize that the 'silver bullet' for TS implementors is to use the same diagram to 'make it easy' for the auditor (it's a game, right?). So lots of folks have used the turtle. I would point out that the IATF have been 'de-emphasizing' the use of turtles recently............

