Group Sampling Inspection Plan for Time Truncated Life Test R package rGrSPTT version 0.1.0 Designing group acceptance sampling inspection plans under time-truncated life tests. The package calculates the required minimum number of groups subject to a consumer's risk constraint on the probability of acceptance. Users can supply failure probabilities obtained from any lifetime distribution, allowing the methodology to be applied without restricting the analysis to a particular probability model. The package also provides a function for plotting the required minimum number of groups against the termination ratio. Saha et al. (2025) <doi:10.1007/s41872-025-00305-w>; Tripathi et al. (2020) <doi:10.1080/02664763.2020.1759031>; Tripathi and Aslam (2024) <doi:10.1285/i20705948v17n3p636>. Software Suggests: testthat (>= 3.0.0) Harsh Tripathi <rsearchstat21@gmail.com> Comprehensive R Archive Network (CRAN) Harsh Tripathi [aut, cre], Mahendra Saha [aut] GPL-3 2026-09-17 application/tgz https://CRAN.R-project.org/package=rGrSPTT doi:10.32614/CRAN.package.rGrSPTT