Happiness Index for products and services.
General principles to identify how a product/Service potentially impacts user/customer happiness. interaction design.
They are not usability guidelines.
PERMA is an acronym for a model of well-being put forth by a pioneer in the field of positive psychology, Martin Seligman. According to Seligman, PERMA makes up five important building blocks of well-being and happiness:
Positive emotions – feeling good
Engagement – being completely absorbed in activities
Relationships – being authentically connected to others
Meaning – purposeful existence
Achievement – a sense of accomplishment and success