I've talked a great deal about briefings (all briefings, including instrument approach procedures) in the past, and consider them absolutely crucial in terms of safe, real-world instrument flying.
In terms of the FAA Instrument Rating - Airplane practical test, it might surprise you to hear that briefing the approach is not among the required Skills for Tasks VI.A. (Nonprecision approach) and VI.B. (Precision approach.) Nor is there mention of the brief as a Risk Management element.
But if not required in the Airman Certification Standards, it's "virtually" required to be successful in instrument flying. Verbal or non-verbal, regardless of the technique or method used, you've just really gotta do it. And failing to do it well is probably going to lead to a failure on the Instrument Rating practical test, because you'll forget something important -- such as ID'ing a VOR or LOC frequency (seen it on practical tests), setting the correct course on the HSI or CDI (seen it on practical tests), choosing the wrong frequency altogether (seen it on practical tests) or forgetting the MDA, DA, or MAP (seen it on practical tests.) I suppose you get the picture there.
There's a lot of good guidance on good briefing techniques out there and I won't attempt to replay them here. They're easy to find on the web.
But you might find this useful: "
Common Approach Briefing Miscues" as I've seen them on practical tests. I wrote this as a blog entry on my website. In this little interactive demo I do speak to some techniques I favor such as proper sequencing of the briefing to include the missed approach being briefed
after, not before the approach procedure itself. And as an instructor I've always taught that a good brief always starts with verifying the chart is current (step #1) and that it's the correct airport, approach, and runway (#2). A very common error is literally loading and/or briefing the wrong approach, so don't be in too big of a hurry to skip these steps. ESPECIALLY... NOTAMS! Surefire way to bust an instrument practical test is to fail to apply NOTAMS which affect how an instrument procedure is to be flown.
Hope this helps, and best of luck to you.