First of all, if you’re not familiar with design metrics, you can search HEART framework. HEART – Happiness, Engagement, Adoption… — First of all, if you’re not familiar with design metrics, you can search HEART framework. HEART – Happiness, Engagement, Adoption, Retention and Task Success. It’s a way to measure the success of your design. “Why do I need to measure,” you might ask. You need to have some kind of…