Suppose we solve a linear program ``by hand'' ending up with an optimal
table (or tableau to use the technical term). We know what an
optimal tableau looks like: it has all non-negative values in
Row 0 (which we will often refer to as the *cost row*),
all non-negative right-hand-side values, and a
basis (identity matrix) embedded. To determine the effect of a
change in the data, we will try to determine how that change
effected the final
tableau, and try to reform the final tableau accordingly.

Mon Aug 24 16:30:59 EDT 1998