Optimal Project Prioritization R package oppr version 1.1.0 A decision support tool for prioritizing conservation projects. Prioritizations can be developed by maximizing expected feature richness, expected phylogenetic diversity, the number of features that meet persistence targets, or identifying a set of projects that meet persistence targets for minimal cost. Constraints (e.g. lock in specific actions) and feature weights can also be specified to further customize prioritizations. After defining a project prioritization problem, solutions can be obtained using exact algorithms, heuristic algorithms, or random processes. In particular, it is recommended to install the 'Gurobi' optimizer (available from <https://www.gurobi.com>) because it can identify optimal solutions very quickly. The 'rcbc' R package (available at <https://github.com/dirkschumacher/rcbc>) can also be used to generate solutions using the CBC optimization software (<https://github.com/coin-or/Cbc>). Finally, methods are provided for comparing different prioritizations and evaluating their benefits. For more information, see Hanson et al. (2019) <doi:10.1111/2041-210X.13264>. Software Depends: R(>= 3.5.0) Imports: utils, methods, stats, Matrix (>= 1.3-0), magrittr (>= 1.5), R6 (>= 2.5.1), cli (>= 1.0.1), assertthat (>= 0.2.0), tibble (>= 2.0.0), ape (>= 5.2), tidytree (>= 0.3.3), ggplot2 (>= 3.5.0), highs (>= 1.10.0.3), viridisLite (>= 0.3.0), withr (>= 2.4.1), rlang (>= 1.1.3) LinkingTo: Rcpp (>= 0.12.19), RcppArmadillo (>= 0.9.100.5.0), RcppProgress (>= 0.4.1) Suggests: testthat (>= 2.0.0), knitr (>= 1.20), roxygen2 (>= 6.1.0), rmarkdown (>= 1.10), gurobi (>= 13.0.0), Rsymphony (>= 0.1.28), ggtree (>= 2.4.2), lpsymphony (>= 1.10.0), lpSolveAPI (>= 5.5.2.0.17), rcbc (>= 0.1.0.9003), fansi (>= 1.0.6) Jeffrey O Hanson <jeffrey.hanson@uqconnect.edu.au> Comprehensive R Archive Network (CRAN) Jeffrey O Hanson [aut, cre] (ORCID: <https://orcid.org/0000-0002-4716-6134>), Richard Schuster [aut] (ORCID: <https://orcid.org/0000-0003-3191-7869>), Matthew Strimas-Mackey [aut] (ORCID: <https://orcid.org/0000-0001-8929-7776>), Joseph R Bennett [aut] (ORCID: <https://orcid.org/0000-0002-3901-9513>) GPL-3 2026-05-27 application/tgz https://CRAN.R-project.org/package=oppr doi:10.32614/CRAN.package.oppr en-US