I read 'experience' here as more or less 'experiment' rather than 'experience' in the English sense, especially given the second occurrence of the word, and 'probante' as 'probative', ie an experiment that provides meaningful evidence for whatever they're trying to work out - 'pertinent', 'relevant'. "Probative" is a word often used when assessing the value, of information, tests etc.

'Experiment' is odd in English outside a scientific context - evokes labs and white coats, whereas I gather what they're doing here is the kind of experimenting that's implied in 'piloting' a scheme, running a 'test-case', ie trying it out and seeing what happens. In that sense there will be 'experience' to be gathered here, but in a formal context.