SURVO MM Help System (web edition)

Unless otherwise stated the estimation method is ordinary least
squares (OLS). As an alternative the Lp norm may be used as the
measure for goodness-of-fit and the p value is indicated by the extra
specification CRITERION=Lp where p is a positive number.
Thus CRITERION=L2 is same as OLS and CRITERION=L1 corresponds to
the minimum absolute deviation, which may also be selected by
CRITERION=ABS. If p<>2, METHOD=H must be used.
  S = more on extra specifications in ESTIMATE 

More information on Survo from
Copyright © Survo Systems 2001-2012.