Estimates are just as much about unknown complexity as well as known complexity. As more information is discovered, estimates should change accordingly.
In Case 1, the actual task has not changed, but the known complexity has changed. This means that an updated estimate will be more accurate. In Case 2, the complexity has decreased because there are less unknowns and the task is much more predictable.
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Estimates are just as much about unknown complexity as well as known complexity. As more information is discovered, estimates should change accordingly.
In Case 1, the actual task has not changed, but the known complexity has changed. This means that an updated estimate will be more accurate. In Case 2, the complexity has decreased because there are less unknowns and the task is much more predictable.