specifies the length of effect names in tables and output data sets to be characters long, where is a value between 20 and 200 characters. The default length is 20 characters.

suppresses a technique for limiting the amount of search required to find a design. The technique dramatically reduces the search time by pruning branches of the search tree that are unlikely to contain the specified design, but in rare cases it can keep the FACTEX procedure from finding a design that does in fact exist. The NOCHECK option turns off this technique at the potential cost of an increase in run time. Note, however, that the run time is always bounded by the TIME= option or its default value. For more information about the NOCHECK option, see the section Speeding Up the Search.

specifies the maximum number of seconds to spend on the search. The default is 60 seconds.