FAQ.md

@@ -58,6 +58,15 @@ The load the R module version you want to use.
 
 ## When stuff doesn't work.
 
+**why won't my job start immediately?**  
+
+ * The cluster uses a ticketing system for the prioritisation of jobs. Tickets are
+distributed over the departments by ratio of investment. Any overcapacity is
+available for incidental processing or for people that have used up their
+tickets. If you find that your jobs are not scheduled in a timely manner,
+your department has probably used its share of tickets. If this happens on a
+structural basis, investment from your departement is the solution.  
+
 **Why won't my job run?**
 
  * Read [error queues](Errorqueue).