I have 4 different factors in my experiment, each of the factors have around 3 to 5 levels, however, while making DoE using customized design, the table is taking up only higher levels and the lower levels are omitted from combinations. I do not want to do a full factorial design as the number of runs would be very high but in customized design, lower values are omitted, can you please help tell how to obtain a table where lower values are not omitted or is there an option where I can specify the values to be included which are mandatory for my experiment.
