When to manually set "Remaining time"?

[Pietros]

When logging work, I see I can "reduce estimate" or "set" it. But how is that different from setting "Remaining" time? Is the only difference than no time is logged, just decreased (i.e. in case of clear overestimation)?

[Renjith Pillai]

Scrum totally relies on what is the actual remaining estimate rather that the original estimate (that was the way earlier project management used to work). The time spent on a issue is not a factor in deciding how much work is remaining in that issue. Which means, every time you log work, you are doing an estimate and putting that value manually in the remaining estimate.

[Jose M.]

mmh, if there is no remaining time, the time spend does not become visible as remaining time. The time spend reduces the remaining time.