Boundary Sweep

If your carefully studied system keeps surprising you, the missing relationship may sit just outside its border. Briefly include what feeds it, what follows it, a neighboring actor, and an effect it sends elsewhere.

Upstream → downstream → adjacent → external cost → prune.

Boundary Sweep changes what your account includes. Add a nearby input, consequence, neighboring actor, and effect outside the current frame, then retain only additions useful for the present purpose. The result may improve an explanation, reveal uncertainty, or suggest a better question. New relationships stay hypotheses until evidence supports them; expanding the border alone proves nothing.

Try this when…

We've examined our part carefully, so why do surprises keep coming?

This problem begins before the point where our diagram starts.

Our improvement seems to create trouble somewhere else.

I need a wider picture without mapping the entire world.

What you can use it for

Explain recurring surprises

Inspect nearby dependencies omitted by a seemingly complete local account.

Reveal displaced costs

Show where a local improvement sends effort, delay, or inconvenience.

Improve a question

Discover which adjacent relationship needs evidence before drawing a confident conclusion.