Using metrics in Scrum Events - Scrum with Kanban

Hi Claudio - I think the following article might help you https://www.scrum.org/resources/blog/4-key-flow-metrics-and-how-use-them-scrums-events. It appears as one of the suggested reading materials prior to taking the PSK1, especially without attending a PSK class first. 

You can validate your mapping compared to that article...

Without feeding you the answer with a spoon... Regarding "when will this item be ready" you need to think about which lean metrics are relevant for single items, and what kind of metric/concept can be used to answer these sort of questions about delivery expectations for single items...

rereading the guide together with the suggested reading should help you wrap your head around some of these metrics concepts...

HTH

Which of the measurements related by Little’s Law allows time to be ascertained?

Average Lead Time = Average Work in Progress / Average Throughput

WIP average and throughput average can help me figure out the average time of an item, so I can give a rough date. But if the question only gives me one alternative, which way should I go?

But if the question only gives me one alternative, which way should I go?

You don't say what the options are, but the metric I'd look for would relate two measurements: the average cycle time and the approximate average cycle time. They ought to broadly match in order to evidence predictability.

It might be helpful to refer back to the metrics in the Kanban Guide for Scrum Teams.

When you refer to "this item", if it is already in the workflow, then you should not disregard the Work Item Age. 

Understanding Little's Law is important, but I doubt it would directly answer the question you are asking.

What benefits do you think an SLE provides? How does that differ from providing an approximate average cycle time?

Bear in mind that a useful forecast ought to include a level of confidence in any estimate made.