degradr: Estimating Remaining Useful Life with Linear Mixed Effects Models

Provides tools for estimating the Remaining Useful Life (RUL) of degrading systems using linear mixed-effects models and creating a health index. It supports both univariate and multivariate degradation signals. For multivariate inputs, the signals are merged into a univariate health index prior to modeling. Linear and exponential degradation trajectories are supported (the latter using a log transformation). Remaining Useful Life (RUL) distributions are estimated using Bayesian updating for new units, enabling on-site predictive maintenance. Based on the methodology of Liu and Huang (2016) <doi:10.1109/TASE.2014.2349733>.

Version:	1.0.1
Depends:	R (≥ 4.5)
Imports:	dplyr, nlme, quadprog, ggplot2
Suggests:	testthat (≥ 3.0.0)
Published:	2025-10-01
DOI:	10.32614/CRAN.package.degradr
Author:	Pedro Abraham Montoya Calzada [aut, cre, cph], Rogelio Salinas Gutiérrez [aut, cph], Silvia Rodríguez-Narciso [aut, cph], Netzahualcóyotl Castañeda-Leyva [aut, cph]
Maintainer:	Pedro Abraham Montoya Calzada <pedroabraham.montoya at gmail.com>
License:	GPL-3
NeedsCompilation:	no
CRAN checks:	degradr results

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