To summarize, when the coefficient of 
in constraint 1 ( )
was changed by -1, this caused the problem to have multiple optima. If
the coefficient had been changed by a smaller negative amount or a positive
amount, no change in the optimal solution would occur. If the change had
been more than 1 in the negative direction, then the optimal solution would
change. Thus, the range of optimality for (,  )
= (0, 7) is  .
Since this provides considerable latitude for an error in estimating  ,
it is not a very sensitive parameter. |
.