Source : Free On-Line Dictionary of Computing

Program Evaluation and Review Technique
     
         (PERT) A method used to size a software product
        and calculate the Standard Deviation (SD) for risk assessment.
        The PERT equation (beta distribution) estimates the Equivalent
        {Delivered Source Instructions} (EDSIs) and the SD based on
        the analyst's estimates of the lowest possible size, the most
        likely size, and the highest possible size of each computer
        program component (CPC).
     
        (1996-05-29)