QA was a 2010 compromise.

Sample QA listened to 2–5% of calls because that was all an army of human reviewers could touch. The other 95% went unscored.

Modern AI scores the entire population without expanding headcount. Auto-QA, real-time agent assist, and Voice of the Customer now run on every interaction.

Policy, product, and exception handling change weekly. Agents need in-the-moment guidance, not feedback two weeks later.

CX leaders now defend cost-per-contact, retention, and CSAT in the same room as the unit-economics team. The math has to be tight.