 Structure-only methods both undershoot and overshoot the number and which sets of variables actually control these models, highlighting the importance of the  system dynamics in determining control.
<clarity>  Structure-only methods both undershoot and overshoot the number and which sets of variables actually control these models, highlighting the importance of the  system dynamics in determining control.
 Structure-only methods both undershoot and overshoot the number and which sets of critical variables best control the dynamics of these models, highlighting the importance of the system dynamics in determining control.