/**
  * getIterationDebut()
  *
  * @return le numero de l'iteration pendant laquelle commence l'activité
  */
 public int getIterationDebut() {
   if (getActRealiseCount() != 0) {
     int debut = ((EugesActRealise) _activites.elementAt(0)).getIt();
     for (Iterator iter = _activites.iterator(); iter.hasNext(); ) {
       EugesActRealise element = (EugesActRealise) iter.next();
       if (element.getIt() < debut) debut = element.getIt();
     }
     return debut;
   }
   return -1;
 }
 /**
  * getIterationFin()
  *
  * @return le numero de l'iteration pendant laquelle se termine l'activité
  */
 public int getIterationFin() {
   if (getActRealiseCount() != 0) {
     int fin = ((EugesActRealise) _activites.elementAt(0)).getIt();
     for (Iterator iter = _activites.iterator(); iter.hasNext(); ) {
       EugesActRealise element = (EugesActRealise) iter.next();
       if (element.getIt() > fin) fin = element.getIt();
     }
     return fin;
   }
   return -1;
 }