The fourth criterion: is there a verifiable definition of 'correct'?

Creative taste may be subjective, but the deliverable itself never has to be. A product's name, its SKU, its claims, its formats, the exact scene required — all of that is checkable. The strongest opportunities, therefore, are those that carry a creative surface but a repetitive operational core. The client notices the campaign or the film; the business makes money because it controls intake, cost, versioning, rights, quality assurance, and delivery. Every job leaves behind a useful lesson: which missing inputs predict revision requests, which prompt template preserves the details that matter, which workflow stays within margin, and which beautiful output still fails to meet the client's actual requirement. Over time, those lessons become the software.