This document discusses measuring the transformation of the policy process from closed to open. It outlines three key aspects: 1) The principle of open should not be measured but rather focus on elements like open data, agenda, participation and being open-ended. 2) The history of closed policy involved power centers with elites who could monopolize information. 3) An open culture fosters mutual accountability and civic participation similar to scientific culture, but risks of too much complex information must be managed. The overall transformation requires a policy process that is open in terms of data, agenda, participation and has no predefined end.