> There is a good comprehensive book on software productivity > "Software Cost Estimation with COCOMO II" Barry W. Boehm et al > Prentice Hall ISBN 0-13-026692-2 I read the book years ago (might have been an older version). I could not avoid the impression that he was matching N data points to determine a formula with N constants. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics