I would set a review point in advance rather than judging by a single week, and I would separate small adjustments from a full change of direction. For a new or substantially revised page, I would usually allow about two to three months, because indexing, ranking movement, and user behaviour need time to settle, especially in a competitive area.
During that period, I would track direction, not just position. Are impressions rising for the intended queries, is the page being shown for relevant terms rather than unrelated ones, and is click-through improving where the title and description match the query? If those signals are moving in the right direction, even slowly, I would keep the core approach and make one focused improvement at a time.
I would change direction sooner if there is no movement at all, if the page is not indexed, if the queries bringing impressions do not match the page topic, or if competitors have clearly changed what a good result looks like for that query. In that case, the first step is diagnosis, not a complete rebuild: check targeting, coverage of the main question, page experience, and whether another page on the same site is competing for the same query.