Two relatively similar ‘logical thinking ways’ exist and have almost the same names: the Logical Thinking Process and Theory of Constraints’ Thinking Processes. One may ask why two? and what differentiate one from another?
The first in time were the Theory of Constraints’ Thinking Processes (TOC TPs, note the plural) that were initiated by Eli Goldratt. These ‘processes’ were merely logic trees and one ‘cloud’.
Later came a variation brought up by Bill Dettmer with his experience teaching the Thinking Processes. The variation consists mainly in:
- the addition of a logic tool that did not exist in the original Thinking Processes: The Goal Tree,
- the Goal Tree as the first tool in sequential order that feeds the different other logic tools, which makes the whole a Thinking Process,
- conversely the denial by Bill Dettmer of the Thinking Processes being… processes!
- the Logical Thinking Process keeping a much more demanding and logically rigorous approach, using deductive logic, not inductive,
- an emphasis on the “rules of logic”, also known as Categories of Legitimate Reservations (CLR) in the jargon.
The addition of the Goal Tree and other points of divergence weren’t taken over into the TOC TPs. Therefore, in order to distinguish this new way from the original one, Bill Dettmer chose to name it the Logical Thinking Process.
You may listen to Bill Dettmer it explaining himself, even so partially, in this short video.