TOC Thinking Process (TP Tools)
The TOC Thinking Processes (sometimes called TP Tools) are integrated problem-solving tools based on rigorous cause-and-effect logic. They enable us to create breakthrough solutions by identifying, challenging and correcting unexamined assumptions. When we are serious about on-going improvement, they help answer fundamental questions such as:
- “What To Change?”
- “What To Change To?”
- “How To Cause The Change?”
TP Work Across Diverse Situations & Circumstances
The TOC Thinking Processes can be used in any business situation, and even as a self-improvement tool to debug and transform one's life. For example, an Olympic hopeful twice failed to qualify for the swim team and was passing her prime. Her detailed TOC cause-effect analysis covered 11 pages with boxes and arrows. In the end, it revealed her need to correct just a few basic shortfalls:
- Ensure that I always take time to stretch
- Remember to carry my water bottle to prevent dehydration
- Think positive thoughts before bed each night
- Build a better communicative relationship with my coach
- Stop training when my body is too broken down and tired
Classic Thinking Process Tools

Part of a Current Reality Tree
Elaborate thinking processes were traditionally applied during a two-week workshop to identify the cause-effect logic and map a detailed solution. These typically included tools such as:
- Current Reality Tree (CRT) - traces all "Un-Desirable Effects" (UDEs) down to the root cause and ultimately identifies the core conflict
- Evaporating Cloud (EC) - articulates the core conflict clearly and surfaces it's hidden assumptions so that one can be invalidated
- Future Reality Tree (FRT) - maps the full implications of the proposed injections to ensure that they are sufficient to solve every UDE (actions which solve the conflict)
- Negative Branch Reservation (NBR) - unravels the logical dependencies of the negative side effect of an injection so that it can be more easily trimmed (eliminated)
- Prerequisite Tree (PRT) - Similar to Transition Tree for more elaborate / complex undertakings
- Transition Tree (TT) - Sequences a complete set of actions to get from a starting point to an end objective
The 3-Cloud Method
Later, Dr. Goldratt developed a streamlined "3-Cloud Method" for more rapid diagnosis and implementation. This method, combined with established TOC applications and detailed implementation templates known as "Strategy and Tactic Trees," are extremely effective for solving many business problems.
If the existing solutions do not apply to your exact situation or require customization, you can hire an experienced adviser to guide you through the Classical Thinking Processes or even attempt it yourself using the Thinking Processes (books, workshops, etc.).
If the existing solutions do not apply to your exact situation or require customization, you can hire an experienced adviser to guide you through the Classical Thinking Processes or even attempt it yourself using the Thinking Processes (books, workshops, etc.).