Try to structure the overall nature of the naval-tender job-shop design problem. What is the relevant planning horizon for the manpower and machine configuration decisions? What are the appropriate decision variables, parameters, constraints, and objective function? Are the uncertainties of the problem very significant? Can the problem be formulated as a single model? What are the difficulties in approaching the problem via a single model? What is the essence of the proposed hierarchical approach? What are the advantages and disadvantages of the hierarchical approach versus a single-model approach?