HEART Metrics for Product Health

I finally discovered Google’s HEART framework. Eduardo Mignot provides a great writeup on HEART and its benefits.

HEART lets you know how healthy your product is; it stands for:

• Happiness 
• Engagement
• Adoption 
• Retention
• Task

Plenty of details in the article so go ahead and read it.

Update: Kerry Rodden created the HEART framework. Her article, How to choose the right UX metrics for your product, describes a couple methods to choose and define metrics that reflect:

• The quality of user experience (HEART framework)
• Goals of your product or project (the Goals-Signals-Metrics process)