retrospectively
adv.thinking about something after it has already happened. You use this when you look back on a past event to understand it better.
adv.considering or reviewing something in the light of past events. Often used to describe the act of applying a new rule or law to a previous period.
“In retrospect, I wish I had taken that job offer.”
“The company decided to apply the new safety regulations retrospectively to all previous projects.”
“While the policy seemed justified at the time, a retrospective analysis of the data reveals several unintended consequences that the original committee had failed to anticipate.”
“Including Passivhaus measures in a building's initial design is much cheaper than trying to add them retrospectively.”
“Cleverly, the shadow housing secretary, claimed changes to national planning policy frameworks will make it easier for travellers to get sites “rubber stamped” retrospectively, “often when they’ve already erected permanent structures”.”