Fixture 	 Wrkr1 	 Wrkr2 	 Wrkr3 	 Wrkr4  
      1 	   1.3 	   1.6 	   2.0 	 1.4
      2 	   2.1 	   1.9 	   2.2 	 1.5
      3 	   1.8 	   1.7 	   1.2 	 1.1