Package: DecisionDrift
Title: Detecting, Decomposing, and Stress-Testing Temporal Change in
        Repeated Decision Systems
Version: 0.1.0
Authors@R: 
    person(
      given   = "Subir",
      family  = "Hait",
      role    = c("aut", "cre"),
      email   = "haitsubi@msu.edu",
      comment = c(ORCID = "0009-0004-9871-9677")
    )
Description: Tools for detecting, decomposing, and stress-testing temporal drift
    in repeated binary decision systems. Complements the 'decisionpaths' package by
    shifting focus from path construction to system-level change over time. Implements
    five core analytic modules: (1) prevalence drift — did the overall decision rate
    change over time?; (2) transition drift — did the probability of switching or
    persisting change?; (3) entropy and stability trends — did path complexity evolve?;
    (4) group-differential drift — did the system drift differently across subgroups?;
    (5) change-point and regime-shift detection — did the system change abruptly after
    a policy or model update? Additionally provides a robustness module for testing
    stability of drift conclusions across analytic choices, and a sensitivity module
    for probing vulnerability to data problems including missingness, miscoding, and
    threshold shifts. Defines four original drift indices: the Decision Drift Index
    (DDI), Transition Drift Index (TDI), Group Differential Drift (GDD), and
    Cumulative Drift Burden (CDB). Applications include algorithmic audit, AI
    governance, education, health, and organisational research.
License: MIT + file LICENSE
Encoding: UTF-8
Language: en-GB
RoxygenNote: 7.3.3
Depends: R (>= 4.1.0)
Imports: cli (>= 3.0.0), rlang (>= 0.4.0), stats, tibble (>= 3.0.0)
Suggests: decisionpaths, ggplot2 (>= 3.3.0), knitr, patchwork,
        rmarkdown, testthat (>= 3.0.0)
VignetteBuilder: knitr
Config/testthat/edition: 3
URL: https://github.com/causalfragility-lab/DecisionDrift
BugReports: https://github.com/causalfragility-lab/DecisionDrift/issues
NeedsCompilation: no
Packaged: 2026-04-12 22:03:02 UTC; Subir
Author: Subir Hait [aut, cre] (ORCID: <https://orcid.org/0009-0004-9871-9677>)
Maintainer: Subir Hait <haitsubi@msu.edu>
Repository: CRAN
Date/Publication: 2026-04-16 19:42:19 UTC
Built: R 4.5.2; ; 2026-04-17 09:18:00 UTC; unix
