From IPAPI

Successful customer outcomes derive from the quality in management work of Dr. Joseph M. Juran where he defined "quality" as a measure of "fitness of use" by the user - especially when that user is the customer of the business.

IPAPI Definition

Successful customer outcome (SCO) - The resulting outcome, and the "process" experienced by the customer behind that outcome in toto, that the customer would define as making their lives simpler, easier and more successful.