There's a message being retweeted around twitter that goes a bit like this "be wary of people writing / talking about theory of constraints that aren't tocico.org certified".
To which I say: Blah!
- I am not TOCICO certified.
- My TOC mentor, Jim, isn't TOCICO certified. He's in his 70s now but a couple of decades ago he (and others) helped develop the TOC thinking processes.
- I run 3 TOC yahoo groups with around 4000 names (I think) on them and very few of the active participents are TOCICO certifed.
- My Agile friend's Rob and Kevin are both TOC experts, in my opinion, and they're not TOCICO certifed.
Oh, and Eli Goldratt isn't TOCICO certified.
That said, I'd totally recommend you get TOCICO certified. From what I know the tests are challenging enough and not likely to be a good filter for bluffers.