Rulebooks: Percentage of data domains covered by rulebooks (i.e. definitions, data models, processes, roles, responsibilities, methodologies).
Source: Legner, Christine; Pentek, Tobias; Ofner, Martin; Labadie, Clément: CDQ Trend Study: Trends in corporate data management, 2017 (https://cc-cdq.ch/cdq-trend-study)
You can request the CDQ Trend Study and other free publications here.