When developing system dynamics models, particularly in economics and
finance, we have repeatedly encountered requirements to analyze termin
al conditions. We believe that this holds more generally for modeling
social problems, too. In this article, we show how to solve system dyn
amics models when some level variables have predetermined terminal con
ditions. With the method presented, it is possible to determine consis
tently the initial states of the level variables given the terminal st
ate conditions.