7.3.12 COST reduced cost is considered negative -l.OE-05
 if below this value


 7.3.13 RESET x. is set to zero if less than l.OE-05
 1
 this value


 7.3.14 ENTRY minimum element size in new 1.OE-07
 transformation


7.3.15 TMULT minimum element size for applying 1.OE-10
 transformation


 8. MULTIPLE SOLUTION PROCEDURES


 Most LCP models, particularly of the economic projection variety are
not created to be used just once and discarded. They are run many times
with different parameter assumptions and variable combinations. In fact,
many models are valuable, not because of the exact numbers they generate,
but because of the insight they give into the behavioral aspects of some
system. As a result, any software that is written for solving models of
this type, should have some facility for changing model coefficients in
a convenient manner. It should, in fact, be possible to do this many
times in a single computer "JOB" or "RUN".
 Unfortunately, the RANDQP and LCRAND will not allow such coefficient
changes after a model has been read in and solved. It must be read in
again completely and then changed before a new model solution can be
generated. The RANDQP was designed so that the user could read the
problem from a disk or tape file, however, it could only be read from
there once.
 In order to develop a coefficient change procedure that meets the
requirements outlined above, without performing major surgery on the
RANDQP code, the following method was developed. A minor modification
was made to the code which causes the unit 11 data set (disk or tape) to
be automatically rewound (re-initialized) after it is read. By placing
the user's problem on a scratch data set defined as FORTRAN unit 11, the
problem can be read in, modified, and solved as many times as the user