Chapter 10 turns quality goals into testable quality scenarios. It helps you move beyond vague words like "fast" or "secure" by describing concrete situations, expected responses, and measurable targets. ISO/IEC 25010 and Q42 can help as a structure and inspiration, but the real value is iteration: refine goals, learn from reality, and tighten scenarios over time. In this article I explain what belongs in chapter 10, what to keep out, a minimal structure you can copy, plus a small example from Pitstop.