At many places in the analysis of the user function, Minuit must
decide whether to be ``safe'' and waste a few function calls in order
to know where it is, or to be ``fast'' and attempt to get the requested
results with the fewest possible calls at a certain risk of not
obtaining the precision desired by the user.
In order to allow the user to influence these decisions, there is an
internal Minuit parameter ISTRAT
which can be set by the user
through the command SET STRategy.
In the current release,
this parameter can take on three integer values (0, 1, 2), and the
default value is 1. Value 0 indicates to Minuit that it should
economize function calls; it is intended for cases where there are
many variable parameters and/or the function takes a long time
to calculate and/or the user is not interested in very precise
values for parameter errors. On the other hand, the value 2 indicates
that Minuit is allowed to waste function calls in order to be sure
that all values are precise; it is intended for cases where the function
is evaluated in a very short time and/or where the parameter errors
must be calculated reliably