**2.3 Flexibility of use (FU)**

It is a related parameter:


An arbitrary numerical scale can be attributed to each of these subjective parameters (for example with a score from 1 to 5: poor, sufficient, fair, good, excellent). An evaluation table of the equipment can thus be constructed for the different clinical "targets" and an overall one obtained from the sum of the partial results, with the aim of both comparing different equipment with each other and checking the stability of the characteristics over time.
