A system scales if and only if it remains coherent under growth without requiring increasing external correction.

Describe the system being evaluated.

What does it do, and what outcome is it intended to produce?

What is the current scale of this system?

(users, revenue, volume, throughput, headcount, or equivalent)

If this system were to double overnight, which specific part would fail first?

What new human work would be required to prevent or recover from that failure?