Test all the things! How Yammer does Product

Yammer's Product Management approach involves defining the problem space and researching its worth before designing solutions, building them, testing, analyzing results, and deciding whether to ship, iterate or kill the feature. The process is collaborative, with product managers working closely with designers, analysts, and engineers. Prioritization decisions are based on quantitative insights from analysts and qualitative research from user researchers. Days engaged, which measures the number of times users engage with the product over a given time period, is considered the best indicator of whether a user is getting value out of the product.