What the Next Designer Needs to Understand

When a project changes hands, the drawing set transfers cleanly and the reasoning does not. This case defines what a successor designer actually needs to inherit: the invariants, the rejected alternatives, and the concessions that were already negotiated once.

Published by Hawk Hill

Date 2026-07-10

Reading duration 7 min read

The Handover Problem

Midway through design development, the project moved to a successor team. The incoming designers received a complete and competent drawing set — and almost no record of why it looked the way it did. Within a month they had reopened two questions the original team had already settled expensively, and proposed removing the entrance gallery whose compression was, unbeknownst to them, the load-bearing move of the entire concept.

Nothing about this failure was carelessness. The set simply did not contain the information needed to defend it. What follows is the handover structure assembled in response — the minimum a successor needs beyond the drawings.

Handover Essentials Defined

01. Invariant Schedule: The qualities that must survive any future revision — the few things that are the project.
02. Alternative Register: Options already tested and rejected, each with the reason it failed.
03. Concession Log: Trades already made — what was given up, to which requirement, and at what price.

What Drawings Cannot Say

A plan can show the entrance gallery is eight metres deep; it cannot show that the depth is doing work — that it compresses the section so the hall beyond can feel released. A door schedule can list a paint grade; it cannot list the three cheaper grades that were rejected because they deadened the same wall that carries the daylight story. The reasoning layer is what turns a drawing set from a specification into an inheritance.

“Every drawing set has a shadow document — the set of reasons that produced it. Projects that never write the shadow document make their successors pay for the same decisions twice.”
— Hawk Hill, Editorial Researcher

The successor team's near-miss with the entrance gallery was resolved by a single page: the intent memo naming compression-then-release as an invariant. Once named, it survived. The lesson generalises — intent that is only implicit is intent that is already halfway lost.

Writing the Intent Memo

The memo the studio now attaches to every outgoing drawing set fits on two pages and follows a fixed order:

The concept in one sentence — what the building is trying to do for its occupants.
The invariants — qualities to be defended at any revision, stated in experiential terms.
The open elements — what future teams may freely change without asking permission.
The rejected alternatives — with reasons, so they are not re-bought.
The standing questions — decisions deliberately deferred and the conditions for resolving them.

A design decision has a history worth understanding — but only if the history is written down while it is still warm. The next designer does not need certainty; they need to know which parts of the drawing are load-bearing.