GOMS technique is used too analyse the time it takes a user too perform actions on their computer. The faster the action time is the more efficient the action is.
These are the calculations based on GOMS. They are only generalized values. In the subject the "M" value was not considered for any part of our exercises.
From examples 2 and 3 you can see that the second one is faster and therefore more efficient in deleting a file.