augment_levels          Augment levels and B-matrix to Full Factorial
                        Design.
check_overshadow        Check Overshadow - Pareto Dominate Solutions
construct_question_frame
                        Convert from choice_sets to a question data
dce_efficiency          Efficiency Measures for Discrete Choice
                        Experiments
fractional_factorial_efficiency
                        Fractional Factorial Design Efficiency
full_factorial          Full Factorial Design
modulo_method           Modulo Method - Described by Street et al.
search_design           Search Full Factorial for Fractional Factorial
                        Design
