Plackett-Burman designs for screening factors

Factorial design and response surface techniques were used in combination with modeling and simulation to design and optimize an 

Factors, levels and response values observed for the 2 screening design used to study earplug properties 

C = Catalyst/extensor solution flow rate (gmin ) 32 36 

Natural variation in the simulation procedure was evaluated from the effect values calculated for the dummy factors (di, i = 1,2. 9), just as done to estimate the standard effect error in case study in Section 4A.6. The effect values are hsted in Table 4A.11. 

For productivity, an uncertainty of 0.16 in the effect values is determined from the results for the dummy variables, 

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