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	Pilotstudie med fraktionerat faktoriellt experiment	Faktoriell experiment
Ämnesområde	Försöksplanering	Försöksplanering
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1950s–1960s (fractional factorial foundation); pilot study integration formalized in 20th century DOE practice	1926–1935
Upphovsperson	Box, Hunter & Hunter (fractional factorial); pilot study concept developed broadly in industrial and clinical experimentation	Ronald A. Fisher
Typ	Experimental screening design (pilot phase)	Quantitative experimental design
Ursprungskälla	Montgomery, D. C. (2017). Design and Analysis of Experiments (9th ed.). Wiley. ISBN: 978-1119492443	Fisher, R. A. (1935). The Design of Experiments. Oliver and Boyd.
Alias	pilot FFE, screening pilot design, pilot fractional factorial, pilot FF screening study	factorial design, factorial ANOVA design, multi-factor experiment, crossed-factor design
Närliggande	5	6
Sammanfattning	A pilot fractional factorial experiment is a small-scale preliminary study that uses a fractional factorial design — testing only a subset of all possible factor combinations — to screen multiple factors simultaneously before committing to a full-scale investigation. It provides early estimates of effect sizes, variance, and feasibility at substantially reduced cost and participant burden compared to a full factorial pilot or a full-scale trial.	A factorial experiment is an experimental design in which two or more independent variables (factors) are manipulated simultaneously, and every combination of their levels is tested. Introduced by Ronald Fisher in the 1920s–1930s, it is the standard approach whenever a researcher needs to detect not only the main effect of each factor but also whether the effect of one factor depends on the level of another — the interaction effect.