 The storage and computation overhead are such that the standard simplex method is a prohibitively expensive approach to solving large linear programming problems.In each simplex iteration, the only data required are the first row of the tableau, the (pivotal) column of the tableau corresponding to the entering variable and the right-hand-side.The latter can be updated using the pivotal column and the first row of the tableau can be updated using the (pivotal) row corresponding to the leaving variable.