The actual key step of phase identification from powder is the selection of the matching entries from the list of candidates, generally based on their FoM-values and some other parameters (and of course a visual inspection by the user). Even nowadays, in most "real-life" cases this step still has to be carried out manually by the user, sometimes requiring a lot of experience on the subject.
Match! is also to able to select the matching entries automatically. Of course, this works only for really simple cases where only one or two dominant phases are present.
In special cases, it is also possible to apply a predefined selection, e.g. if a series of similar samples has to be investigated.
The actual entry selection procedure is described here.