Note that we write 2k p to denote a fractional factorial design in which each factor has 2 levels, there are k factors, and we are taking a 1=2 p fraction of the number of possible factor level combinations. Therefore this design is appropriate for lower number of factors, as the number of experiments needed may get quite high, eg. 1024 experiments for 10 factors without replications (n = 10, m = 1).

## 1 Jan 1994 ... The design allowed us to select 2 media that .... f(-3, -1), ..., f(3, 1) to obtain the corresponding ... Fractional factorial design for 2-level factors are.

Taguchi designs - Minitab For 2-level designs based on L8 (3 or 4 factors), L16 (3-8 factors), and L32 (3-16 factors) arrays, Minitab will choose a full factorial design if possible. Unit 5: Fractional Factorial Experiments at Two Levels Why Use Fractional Factorial Designs? • If a 25 design is used for the experiment, its 31 degrees of freedom would be allocated as follows: Main Interactions Lecture 10: 2 - stat.purdue.edu