Yep, the 9-block tool was implemented by Jack Welch-GE years ago to eliminate fat; it worked for them. Cote became the Honeywell CEO and utilized the 9-block. Here's the the key, in 2009'ish, Jeff Immelt-GE abolished the 9-Block for the reasons us managers have known for years; pressuring managers to apply incorrect reviews and performance results weren't accurately measured. Google it. I've managed for 12 years of my 32 years at Garrett, Allied-Signal, Honeywell. Managers up to Presidents of SBU's don't like the 9-block tool; I can testify in court on a lie detector test today that I'm truthful. You may wonder why I can't pursue an initiative to get my voice heard; I would simply be removed from my position because I can't differentiate employee performance.
Sure, I have an employee every other year that is in the outer L area; it's legitimate but very light based on Results. I manage folks based on, 90% Skill and Abilities and 10% Behaviors; there are many other managers who do the same. We do our best with the horrible 9-Block B_llSh_t tool.
Someday, I suspect there will be a real anonymous feedback tool and speak my piece higher than a Tier 2.