Quality is often elusive. While it's often relative and has an air of, "I'll know it when I see it," it can still be defined locally.
In my time as a design leader, establishing a bar for a high level of execution has been a persistent challenge. Continually shipping quality product experiences means that you have to have an unwavering focus on the details. This is never an easy task if you're working to shape high-level product strategy.
I'm pondering this article by Rachel Kobetz, which posits a framework for defining and maintaining quality within a design org: https://medium.com/defining-experience/scaling-quality-4-steps-to-foster-a-culture-of-empowerment-and-accountability-for-design-60c1f195988f?