ALT 1. Top tasks success rate > 80% (for most important tasks). 2. Time to complete < 35s (for most important tasks). 3. Time to relevance < 30s (for navigation and search). 4. Search results relevance rate > 80% (for top 100 search queries). 5. Search query iterations < 3/query (to avoid dead-ends in search). 6. Average frequency of errors < 3/visit (mistaps, double clicks). 7. Error recovery speed < 7s (effectiveness of error messages). 8. Accuracy of data ≈ 100% (input provided by customers in forms). 9. High-intent action rate > 4% (the effectiveness of a campaign). 10. Sales and marketing costs < $15K/week (poor design -> increased marketing costs). 11. Revenue growth rate >5% (how design helps with business goals). 12. Retention rate > 90% (indicates price/quality ratio). 13. Annual churn rate < 7% (indicates price/quality ratio). 14. Onboarding time < 15 sec (how quickly users can get to a first success moment). 15. Service desk inquiries < 35/week (poor design -> more inquiries).