penalize the dropping of workpieces on the field

Dropping workpieces on the field is an action equivalent to dropping
products or materials on the floor of a factory, which would require
additional clean-up. While it can be convenient for teams to just drop
workpieces, it should be penalized so that teams avoid such behavior
and instead use alternatives like shelves, storage stations, ring
payment slides or delivery stations.

rulebook.tex

@@ -1764,6 +1764,17 @@ \subsection{Task Fulfillment and Scoring}
         than 0 points.
         &$- 10$
         \\
+        Dropping a workpiece from a robot
+        & Dropping a workpiece on the floor of the field intentionally or
+        through failed grasping attempts
+        & $-10$
+        \\
+        Dropping a workpiece from a machine
+        & Dropping a workpiece on the floor through faulty machine interactions
+        (e.g.\ a workpiece overshooting on a slide or an output sensor
+        malfunctioning)
+        & $0$
+        \\
         Obstruction
         & Deliver a workpiece to a machine of the opposing team
         & $-20$
@@ -1814,6 +1825,8 @@ \subsubsection{Referee Box Operator}
   \item observe the \ac{refbox} status to ensure the correctness of
     the digital representation and automatic scoring,
   \item manually confirm delivered orders (if workpiece tracking is disabled),
+  \item manually score interactions that can not be automatically tracked
+        (e.g., dropping workpieces),
   \item announce critical situations to the field referees (e.g., if a machine
     that is mocked up as described in \refsec{sec:mockup-machines} is
     instructed and needs manual operation),