NHS Cancer Waiting-Time Analysis, Benchmarking and Multilevel Modelling R package nhscancerwaits version 1.0.2 Provides tools for importing, harmonising, cleaning, analysing, benchmarking and visualising National Health Service (NHS) England Cancer Waiting Times data. The package supports national performance monitoring, provider-level benchmarking and cancer pathway comparisons through key performance indicator summaries, provider filtering, clustering analyses, mixed-effects regression models, variance decomposition, intraclass correlation coefficient estimation, adjusted provider performance estimation and sensitivity analyses. Functions are included for exploratory analysis, publication-ready visualisations and spreadsheet exports, supporting reproducible health services research, cancer services evaluation, quality improvement and assessment of waiting-time performance across healthcare organisations. Mixed-effects modelling functionality is based on Bates et al. (2015) <doi:10.18637/jss.v067.i01>. Multilevel modelling concepts and variance decomposition follow Gelman and Hill (2007, ISBN:9780521686891). Cancer Waiting Times definitions and reporting standards follow NHS England <https://www.england.nhs.uk/statistics/statistical-work-areas/cancer-waiting-times/>. Software Depends: R (>= 4.2.0) Imports: dplyr, tidyr, readr, readxl, stringr, lubridate, rlang, ggplot2, scales, lme4, broom.mixed, performance, cluster, stats, writexl Suggests: testthat (>= 3.0.0), knitr, rmarkdown, quarto, covr Muhammad Zahir Khan <zahirstat007@gmail.com> Comprehensive R Archive Network (CRAN) Muhammad Zahir Khan [aut, cre] (ORCID: <https://orcid.org/0009-0005-7645-8960>) MIT + file LICENSE (https://CRAN.R-project.org/package=nhscancerwaits/LICENSE) 2026-06-19 application/tgz https://CRAN.R-project.org/package=nhscancerwaits doi:10.32614/CRAN.package.nhscancerwaits en-GB