Weaving efficiency can be improved by minimizing work stoppages through the optimum adjustment of yarn stresses and yarn properties. Weft yarn loading, weft stresses, and elongation are covered. Improvements in performance entail higher weft yarn loading, differential speed changes in yarn transport (especially braking). and yarn with better dynamometric properties. Lower weaving costs and higher fabric quality are goals that are now associated with optimum rather than maximum machine performance. 3 refs.