CMP.6:4.6 - Revisit the source of a failed improvement

When the step fails, locate whether the direction, extent, feasibility repair, feedback or assumed relation to the objective changed. Revise that part. If local moves repeatedly stop at unsatisfactory candidates, enlarge or change the neighborhood, restart from another candidate, use CMP.4 to explore alternatives or obtain a bound through CMP.5.

Compare alternatives by the quality and cost relevant to the receiving use, using the existing characterization and improvement methods. Faster iteration is valuable only in relation to the result it obtains.