fractional balanced design conjoint analysis

We would like to generate fractional design for a conjoint 
analysis. For example we would like to reduce 2x2x2x2x3 --> 
12-16 profiles. 

package BHH2 includes routines for 2-level fractional factorials with specified generators.
package FrF2 provides a different 2-level fractional factorial design toolkit.

Something tells me you won't get a balanced 2x2x2x2x3 fractional in 16 or fewer runs though. I think 18 is possible.

S Ellison

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