Posted on ma 28 september 2020 in tools

PMI stands for Plus, Minus, Interesting. It is an analysis tool for ranking between different options to find the one that may be best among the available alternatives at this point in time.


When in a group, someone presents the different options. For every option, the other participants give their opinion on what they find are positive, negative and interesting (neutral) aspects of the option under consideration.

These aspects are written down and scored. For every positive aspect assign +1, for every negative aspect assign -1. Optionally, aspects can be weighted. For every option, take the total of all aspects.

The option with the highest score can be considered the best among the available alternatives.

Example of PMI

This PMI analysis is from the design Hexagons Proeftuin Meerhoven:

Shapes → Dome Tunnel Silo Beecomb Cube
Aspect dome tunnel silo beecomb cube
Modular / versatile 1 1 1 2 1
Oranic shape 3 2 2 3 1
Simple construction 0 3 2 2 3
Fits available area 3 1 2 3 1
Wind resistant 3 2 1 2 1
Total 10 9 9 12 7

In this case, the beecomb emerges as the best among the available options.