# Attrition and influence after a verified design

Attrition and influence diagnostics can support sensitivity review, but they do not replace the verified external target or authorize outcome-driven reweighting.

After a weight plan is locked, inspect influential units without changing the weights:

    influence <- wf_influence(
      locked,
      target = target,
      sample = design$data,
      id = design$roles$id,
      top = 20
    )

    influence$table

If panel-retention weights are studied, keep their formula, stabilization, trim settings, and balance diagnostics as a separate sensitivity analysis. Do not select those settings to make an outcome cross a preferred threshold.

    impact <- wf_assess_impact(
      locked,
      analysis_data,
      id = "person_id",
      outcomes = c("score", "approved")
    )

    wf_report(impact, audience = "statistician")