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Thank you very much for the advice.

I have re-examined the attributes and levels, and utility functions and done a factorial design as below that will be used for piloting then do an efficient design later.

Design
;alts = oral, injec, ring, impl, none
;fact
;rows = 12
;model:
U(oral) = oral_asc ...

Hello friends,

I am trying to generate a fractional labelled experimental design in Ngene and the alternatives I have a varying number of attributes and differing levels for the attributes.

Alt 1 - Oral
Alt 2 - Injection
Alt 3 - Vaginal ring
Alt 4 - Implant

I have 6 attributes:

1. Number of ...