So sánh phương pháp

	Thử nghiệm A/B thí điểm	Thử nghiệm A/B theo yếu tố
Lĩnh vực	Thiết kế thí nghiệm	Thiết kế thí nghiệm
Họ	Process / pipeline	Process / pipeline
Năm ra đời	2000s–2010s (formalized in digital experimentation literature)	Factorial design: 1920s–1930s; applied online as factorial A/B test: 2000s–2010s
Người khởi xướng	Derived from pilot study methodology (Kraemer et al., 2006) applied to A/B testing practice	Ronald A. Fisher (factorial design); digital A/B testing popularized by Google, Microsoft, and Amazon in the 2000s
Loại	Experimental design — feasibility study	Controlled online/field experiment
Công trình gốc	Thabane, L., Ma, J., Chu, R., Cheng, J., Ismaila, A., Rios, L. P., Robson, R., Thabane, M., Giangregorio, L., & Goldsmith, C. H. (2010). A tutorial on pilot studies: The what, why and how. BMC Medical Research Methodology, 10(1), 1.	Kohavi, R., Tang, D., & Xu, Y. (2020). Trustworthy Online Controlled Experiments: A Practical Guide to A/B Testing. Cambridge University Press. ISBN: 978-1108724265
Tên gọi khác	pilot split test, feasibility A/B test, preliminary A/B experiment, pilot randomized comparison	factorial split test, multi-factor A/B test, factorial online experiment, factorial controlled experiment
Liên quan	5	6
Tóm tắt	A Pilot A/B test is a small-scale, preliminary split-test experiment run before a full A/B test to assess feasibility, estimate effect sizes, detect operational problems, and validate measurement instruments. Participants are randomly assigned to a control condition (A) and a treatment condition (B), but the study is explicitly underpowered — its purpose is to inform the design of the definitive test, not to yield a conclusive comparison.	A factorial A/B test is a controlled online experiment that simultaneously manipulates two or more independent factors, each at two or more levels, exposing different user groups to every combination of factor levels. Rooted in Fisher's factorial design and operationalised at scale by tech companies, it enables researchers to estimate both the independent main effect of each factor and the interaction effects between factors — all from a single experimental run.