The Dutch youth care sector defends and supports children in their maturing process. Over last decades this complex and heavily resource bound health care system faced long waiting lists and over utilized resources. Various policies based on increasing budgets and care capacities did not result in the expected structural waiting list decreases. Youth care authorities and care providers require decision support models to oversee the consequences of their mutual capacity decisions. In this research we practically evaluate the insights a stochastic Discrete Event Simulation model provides, in addition to the currently used deterministic System Dynamic model, when parameterized with data of a real world care provider over 2008 and 2009.