During our evaluation of Tuleap we identified a missing feature.

We wanted to define (compute) a value of a field from two Selectboxes, but it appears this is not possible.

In the simplest form this could be done in a similar way the workflow is defined or the "Manage field dependencies" feature - in a matrix. For each "cell" of the matrix, where column is represented by one Selectbox and row the other one, you would define a value to be shown in the field.

A more generic way would be to allow multiple fields as the inputs and you would then need to define a specific combination of values of input fields to get a specific output. As far as I see the most practical filed types for it would be: Selectbox, Multi Select Box, Radio button, Checkbox, Integer and Float.

Probably the simpler form would cover most needs...

An example (of the simpler implementation) where this would be useful is in a risk management tracker.

Imagine that you have Selectboxes for a "Probability" and a "Consequence" field and you want to "compute" the value of "Risk Level" field from them.

Each combination of values from the two input fields would generate an appropriate value for "Risk Level" field.

See attached image: "example.png"