Used to define the calculation mode of the ideal volume classes.
If it is set to location, the possible locations for the
reassignment are sorted by volume class order, from the
highest to the lowest (with respect to the maximum volumes defined in the
volume class table). Products are also sorted by
volume order processed by decreasing day. The ideal product class
dealing the largest volume will be the volume class of
the first location (highest volume class). The next product
will have the volume class of the second location and so on and so forth.
If it is set to target coverage, the ideal volume class of a product
is determined by comparing the processed volume of this
product multiplied by the number of days of the target coverage,
with respect to the maximum volumes defned for each class in the
volume class table.