Wafer fab cycle forecast under changing loading situations

This paper describes a successfully applied method to predict future wafer fab cycle time under different fab loading situations. To meet customer demands, a confident cycle time commitment is necessary especially if fab loading will significantly increase. To handle this complex forecast, an easy to use methodology was been developed and successfully used during a+15% fab loading ramp up project. Based on individual work center operating curves, a quite realistic detailed cycle time prognosis for an existing wafer fab was done.