A powerful, easy-to-use multi-criteria decision and evaluation tool

**If you make decisions using numbers you need Tetra**

**What is Tetra?**

Tetra is the only software for evaluation, measurement and decision making that is based on sound mathematical foundations.

**Why is it needed?**

There are logical and mathematical errors at the foundations of decision theory, game theory, economic theory, psychology, and other social science disciplines — see Mathematical Foundations of Decision Theory. These errors can be avoided by using Tetra.

**How does it work?**

Tetra constructs preference scales using a user’s (or users’) criteria weights and alternatives’ ratings.

- The user specifies the alternatives to be considered, the criteria and sub-criteria on which the alternatives are rated.

- Alternatives are rated on the criteria in a simple and intuitive manner and the criteria are weighted by their relative importance.

- Tetra then rates the alternatives on a scale that takes into account all these pieces of information.

Tetra is easy-to-use, intuitive, and powerful. No mathematical knowledge is required from the user (the heavy math is “under the hood”).

Tetra is also available as a service (SaaS). Contact us for details.