Goal Tree Chronicles – Enablers vs.triggers

In this post I explain the difference between enablers and triggers in logic trees, which basically is explaining how Necessity logic differs from Sufficiency logic. I then explain the basic assumption when building a Goal Tree and why the Goal will not automatically be achieved even if a most of Necessary Conditions are fulfilled. Necessity … Continue reading Goal Tree Chronicles – Enablers vs.triggers


Reader question: Goal Tree vs. Current Reality Tree

Here is a reader's question: I have difficulty seeing the difference between the Goal Tree and the  Current Reality Tree (CRT). With these two trees we assess the process. What are the main differences between the two? The Goal Tree and Current Reality Tree (CRT) have nothing in common. They are not even meant to care … Continue reading Reader question: Goal Tree vs. Current Reality Tree

Beware of the Logical Thinking Process apparent simplicity

It happens often with methods and tools that look simple: people giving it a try think they master the subject when in reality they more or less failed with their trial. It is not different with the Logical Thinking Process. The Current Reality Tree is maybe one of the logic trees the most attractive to … Continue reading Beware of the Logical Thinking Process apparent simplicity

Why would I learn to think (logically)?

Most people are convinced of their ability to think logically and don’t see the point of getting a specific training like the Logical Thinking Process  training course. Indeed, in some extend most of the people have an innate basic logical thinking way, otherwise our world would be pretty weird. Yet it is also true that … Continue reading Why would I learn to think (logically)?

What is a critical root cause?

A root cause is the beginning of the cause-effect relationship*. Thus when working down the chain of causes and effects from a problem to its cause, a Root Cause Analysis (RCA) meets causes themselves being effects of some underlying causes and so on, down to the root cause from which everything about the problem originated. … Continue reading What is a critical root cause?

Redefining “problem” (with Goal in mind)

In problem solving or continuous improvement workshops a problem is usually defined as a gap between the actual situation and the desired situation, and thus a problem causes an unsatisfactory situation or an UnDesirable Effect (UDE). This definition, while true, is somewhat too vague to be useful when working on solving problems and continuous improvement. … Continue reading Redefining “problem” (with Goal in mind)

Is Lean about eliminating waste or not?

Some thought leaders and Lean promoters stress the fact that Lean is about eliminating waste while others seem to get away from this idea. Could some have been wrong? Is there a shift in Lean Thinking? What is Lean finally about? Is Lean about waste elimination or not? Well, yes and no. Defining waste Waste is … Continue reading Is Lean about eliminating waste or not?

What is an Executive Summary Tree?

An Executive Summary Tree is not another type of tree in the Thinking Processes tool box, but a concise, condensed form of a Current Reality Tree or Future Reality Tree for presentation to executives. Bill Dettmer got used to make short, concise briefings to general officers in his career in the military. Their civilian counterparts, … Continue reading What is an Executive Summary Tree?

Conflict Resolution Diagram / Evaporating Cloud

The Conflict Resolution Diagram (CRD), also known as Evaporating Cloud (EC) or simply 'Cloud', is a necessity-logic based tool from Theory of Constraints’ Thinking Processes. As the name tells, the Conflict Resolution Diagram is used to surface and resolve conflicts, e.g. dilemmas. Conflicts, which can be named ‘different points of view’ are not always obvious, … Continue reading Conflict Resolution Diagram / Evaporating Cloud

Bending the Current Reality Tree

The Current Reality Tree (CRT) is one of the Theory of Constraints (ToC) Thinking Processes (TP) tools. A CRT is built on Undesirable Effects (UDEs) linked by logical cause-effect-cause relationship called “sufficiency”. Sufficiency logic relationship is in the form of “if A is true then B is true”, or “if A exists, then B exists”. … Continue reading Bending the Current Reality Tree