Design and Analysis for Clinical Trials R package DACT version 1.0.0 The applications and evaluation of the operating characteristics of many statistical methodologies require the use of sophisticated software or extensive simulations. 'DACT' is designed to serve a wide range of innovative statistical designs and analyses. The primary objective of the 'DACT' software is to promote the understanding and application of cutting-edge statistical solutions in clinical trials. For this reason, the software is free for non-commercial scientific research, including but not limited to academic researchers and research/teaching institutions. Computing codes are available upon request. For more details see P. Gao (2024) <doi:10.1080/10543406.2024.2341673>. Gao, P., Zhang, W. (2024) <doi:10.1080/10543406.2024.2358796>. P. Gao & Y. Li (2024) <doi:10.1080/10543406.2023.2233590>. P. Gao, Y. Li (2024) <doi:10.1080/10543406.2024.2342518>. Gao, P., L. Liu, and C. Mehta. (2013) <doi:10.1002/sim.5847>. Software Depends: clinfun, mvtnorm, doParallel Imports: foreach, dplyr, jsonlite, MASS, survival Ping Gao <support@innovatiostat.com> Comprehensive R Archive Network (CRAN) Ping Gao [aut, cre] MIT + file LICENSE (https://CRAN.R-project.org/package=DACT/LICENSE) 2026-09-28 application/tgz https://CRAN.R-project.org/package=DACT doi:10.32614/CRAN.package.DACT