Holacracy Community of Practice Archive, 2015-2019 Community Holacracy Web Site

It is clear to me that the LL assigns metrics. A metric is just an information, like "Average Session Time". My doubt is about targets. Is the Lead Link also responsible for setting a target, like "our target for the Average Session Time metric is 20 minutes". If not, how do you handle targets (and target expectations) in a Holacracy-powered organization?