"Harlan Grove" wrote...
"Max" wrote...
...
Thanks for the example link to David Hager's post
It's a pity though, that David's post received
no response from the OP ..

Why?

Positive feedback is unnecessary. Plenty of negative feedback is
forthcoming
when anything is amiss. And as any systems engineer will tell you, negative
feedback provides correction, positive feedback leads to instability.

Also forgot to mention that I'm aware of at least one Lotus 123 approach to
this that predates David Hager's previously linked newsgroup response by
several years.

Very, very little is original in these newsgroups.