DEFINITION: Convergence control on public policy goals attainment ABB is a Principle designing and implementating sufficient mechanisms in order to attain full visibility on effective realisation of public services, based on public policies, by putting in place processes and procedures that provide accountability to stakeholders Source: Europarl (https://www.europarl.europa.eu/RegData/etudes/IDAN/2018/614502/IPOL_IDA(2018)614502_EN.pdf) EXAMPLES: The following implementation is an example on how this specific Architecture Building Block (ABB) can be instantiated as a Solution Building Block (SBB):