“We found instead that two-pizza teams could also operate successfully in a matrix organization model, where each team member would have a solid-line reporting relationship to a functional manager who matched their job description—for example, director of software development or director of product management—and a dotted-line reporting relationship to their two-pizza manager. This meant that individual two-pizza team managers could lead successfully even without expertise in every single discipline required on their team. This functional matrix ultimately became the most common structure, though each two-pizza team still devised its own strategies for choosing and prioritizing its projects.”