Finding integer efficient solutions for bicriteria and tricriteria network flow problems using DINAS

This article describes a method for adjusting into integral form the noninteger compromise solutions obtained via DINAS to interactively solve the bicriteria and tricriteria network flow problems. Utilizing the special properties of network flows, particularly the formation of a unique cycle associated with moving from an extreme point solution to its adjacent extreme point solution, the method only requires the observation and manipulation of the decision variable values of the compromise solutions.