1. A computer-implemented method using a macro integrated into statistical analysis software for statistical analysis and summarization of a stability study on a pharmaceutical product which comprises, inputting and summarizing data observed for a stability study on a pharmaceutical product, statistically analyzing the data, including using at least one regression function to characterize the time-response relationship of at least one stability response variable and, to estimate a shelf life of the pharmaceutical product or confirm the shelf life of an existing pharmaceutical product, and providing standardized output data and graphical presentations of observed stability response data.