Measurement of productivity growth during plant startup

Measurement of productivity growth at thirty continuous steel casting plants disclosed universally long startup duration ranging from one to six years. This research finding extends the development of productivity growth measurement, which began with the aircraft learning curve forty years ago, to a significantly sized sample taken from one new machine-intensive technology. The manufacturing progress function, which is the inverse technology. The manufacturing progress function, which is the inverse of the learning curve, was the model used for measurement. Log-log graphs of data from these thirty plants, which are located in ten countries, on four continents, provide visual evidence of regular productivity growth during startup. Statistical results from linear regression of its logarithmic transformation show that the manufacturing progress function describes startup very well.