Choosing Solution Selection Method

Whether selection is made using the solution level method or the solution number method, the ways of selecting solutions are the same. In the single-selection case, solutions are selected by parameter index or, if the solution is time-dependent, by value. In the multiselection case there are a number of selection input options all, first, last, by index from existing values, by manual indices, or, in time-dependent cases, by time.

Which method to use is not self-evident. The solution level method is perhaps the more intuitive of the two because it attempts to treat each individual level separately. The solution number method, however, is more general, and can pinpoint which tuples to use with more precision. The recommendation is to use the solution level method wherever possible, and resort to the solution number method only if its special characteristics are needed.