Through a variety of means (surveys, official statistics or direct observation where relevant, expert evaluations, consultations etc.), key indicators of performance should be regularly tracked: satisfaction and trust (among regulated subjects, citizens, consumers, etc.), efficiency (costs to the budget, burden to regulated subjects) and effectiveness (safety, health, environmental protection etc.). While there are significant challenges and costs involved in data collection, this performance tracking is absolutely indispensable to the good functioning of the system, and its improvement – and it should form the foundation for regular assessments, reviews, changes and reforms if required.