Week 12: Closing the Loop - Back to Three Logics

No new facts this week — the course ends where it started, testing the three-logic framework and the throughline claim against your own redesign instead of someone else's box

10 May 2027

No new source this week. Week 1 opened with three packages and a claim this course would spend twelve weeks testing. This lecture is short on purpose — the real work this week is in the defense, not in more content.

Where the claim stands#

Across eleven weeks: a flute choice is a cost-and-protection trade with no sustainability content of its own (week 2). A drop-test standard prices out return and liability risk, not environmental harm (week 3). An oversized box is a real, quantifiable freight cost, chosen because it’s cheaper for the warehouse, not because anyone thinks it’s fine to ship air (week 4). Even a rigorous, peer-reviewed sustainability data source turned out to be published by the industry it favours (week 5). Returns cost real money to process, and some brands would rather refund an item than get it back (week 7). A reveal sequence works on a customer psychologically, separate from what it costs to build (week 8). A dangerous-goods label is standing in for paperwork written by a regulator with no interest in the customer’s experience (week 9). And accessible design is a constraint none of the other logics were built to notice at all (week 10).

None of the eleven weeks needed to invoke “sustainability” as the real driver of a design decision. That’s the throughline claim holding up across eleven applications — not proof it’s universally true, but eleven cases where a plausible-sounding environmental story turned out to have a cheaper, more specific explanation underneath it.

What week 11 asks of that claim#

Your own redesign is the twelfth test, and the first one you built rather than analysed. Locate it: which of week 1’s three logics — brand experience, logistics cost, compliance — does your redesign lean on most? Where does it complicate the throughline claim rather than confirm it — did you make a genuinely sustainability-motivated choice anywhere, and if so, what did it actually cost, and was that cost worth it on its own terms rather than as marketing?

This week’s lab#

Final Defense — present and defend your redesign against the six constraints and this course’s throughline claim.