Package: simFastBOIN Type: Package Title: Fast Simulation of Bayesian Optimal Interval Designs for Phase I Trials Version: 2.1.0 Date: 2026-10-13 Authors@R: person(given = "Gosuke", family = "Homma", role = c("aut", "cre"), email = "my.name.is.gosuke@gmail.com", comment = c(ORCID = "0000-0002-6854-5627")) Description: Design and evaluate phase I dose-finding trials that use the Bayesian optimal interval (BOIN) design of Liu and Yuan (2015) . Functions are provided to tabulate the decision boundaries, to simulate trials, to estimate the dose-toxicity curve under a monotonicity constraint and to select the maximum tolerated dose. The simulation engine is written in C++ and draws one random variate per patient in enrollment order, which reproduces the reference implementation in the 'BOIN' package trial by trial for a given seed. The traditional 3+3 design is provided as a comparator, with operating characteristics obtained in closed form rather than by simulation. For toxicity that is observed late, the time-to-event BOIN design is provided with the two estimators of Yuan and colleagues (2018) and Lin and Yuan (2020) . Patients who arrive while the dose escalation waits can be backfilled to lower doses with the designs of Zhao and colleagues (2024) and Chen and colleagues (2026) , the latter with the suspension rules of Chen and colleagues (2025) . Trials of two drugs given together are handled by the drug-combination design of Lin and Yin (2017) . License: MIT + file LICENSE Encoding: UTF-8 Depends: R (>= 3.5.0) Imports: Iso, Rcpp (>= 1.0.0), stats, utils LinkingTo: Rcpp Suggests: BOIN, ggplot2 (>= 3.4.0), knitr, rmarkdown, spelling, testthat (>= 3.0.0) Language: en-US URL: https://gosukehommaex.github.io/simFastBOIN/, https://github.com/gosukehommaEX/simFastBOIN BugReports: https://github.com/gosukehommaEX/simFastBOIN/issues Config/testthat/edition: 3 VignetteBuilder: knitr Config/roxygen2/version: 8.0.0 Repository: https://gosukehommaex.r-universe.dev Date/Publication: 2026-10-16 09:43:08 UTC RemoteUrl: https://github.com/gosukehommaex/simfastboin RemoteRef: HEAD RemoteSha: 7921ffaba7b50b2e0ec919f9831f7d46d52a88b6 NeedsCompilation: yes Packaged: 2026-10-16 12:38:51 UTC; root Author: Gosuke Homma [aut, cre] (ORCID: ) Maintainer: Gosuke Homma