1. Guest editorial

   EditorialNotes Pages: i - ii

2. Hierarchical production management applied to an iron and steel industry

   • Marie -Claude Portmann
   • Dominique Rohr

   Papers Pages: 79 - 85

3. Modelling a tool switching problem on a single NC-machine

   • Caroline Privault
   • Gerd Finke

   Papers Pages: 87 - 94

4. Scheduling independent jobs on uniform parallel machines to minimize tardiness criteria

   • Alain Guinet

   Papers Pages: 95 - 103

5. Flow shop scheduling with multiple operations and time lags

   • J. Riezebos
   • G. J. C. Gaalman
   • J. N. D. Gupta

   Papers Pages: 105 - 115

6. An aggregation procedure for the deterministic job-shop problem

   • Bernard Penz
   • Lionel Dupont

   Papers Pages: 117 - 122

7. A Lagrangian relaxation technique for the general assembly line balancing problem

   • E. H. Aghezzaf
   • A. Artiba

   Papers Pages: 123 - 131

8. Modelling and managing disjunctions in scheduling problems

   • Patrick Esquirol
   • Marie -Jo Huguet
   • Pierre Lopez

   Papers Pages: 133 - 144

9. Heuristics for the minimum project-duration problem with minimal and maximal time lags under fixed resource constraints

   • K. Neumann
   • J. Zhan

   Papers Pages: 145 - 154