Bayesian Single-Arm Design with Survival Endpoints R package BayesDesign version 0.1.1 The proposed event-driven approach for Bayesian two-stage single-arm phase II trial design is a novel clinical trial design and can be regarded as an extension of the Simon’s two-stage design with the time-to-event endpoint. This design is motivated by cancer clinical trials with immunotherapy and molecularly targeted therapy, in which time-to-event endpoint is often a desired endpoint. Software Chia-Wei Hsu <Chia-Wei.Hsu@stjude.org> Comprehensive R Archive Network (CRAN) Chia-Wei Hsu [aut, cre], Haitao Pan [aut], Jianrong Wu [aut] GPL-2 2021-05-04 application/tgz https://CRAN.R-project.org/package=BayesDesign doi:10.32614/CRAN.package.BayesDesign