SCORING GOVERNANCE

Every score has a version, formula and evidence trail.

PlanProof publishes how the schedule-health indicator is calculated and preserves every historical score when a report is recalculated.

Publication update: 6 October 2026. Model v1.2 is unchanged; the demo now shares one source across the homepage and reports. Inspect sample NT-1.0 · Reproduce the public test suite

FORMULA

Category penalty

Each category starts at 100. Every finding applies its severity base weight plus a logarithmic volume adjustment. A single issue matters, while very large counts do not overwhelm every other signal.

penalty = min(severity weight + log₂(count + 1) × 2.25, 28)

For each category: round(100 − sum of its finding penalties), with a minimum of zero. Then combine those rounded category scores using the weights below and round the weighted sum. Empty categories score 100. The demo, homepage and exports share the same input version and calculation.

PROFESSIONAL BOUNDARY

A quality indicator—not certification

The score supports triage and consistent review. It does not certify contractual compliance, determine delay entitlement, replace a controlled CPM recalculation, or replace professional planning judgement.

WEIGHTING

Severity and category weights

Finding severity

critical14

high9

medium5

review2

Schedule category

logic22%

float18%

constraints13%

progress18%

durations12%

relationships17%

STANDARDS CONTEXT

Principles considered by the methodology

  • DCMA 14-Point Schedule Assessment concepts
  • GAO Schedule Assessment Guide principles
  • AACE recommended practices for schedule quality and update review

References describe methodological context only. PlanProof does not claim endorsement, affiliation, or automatic compliance with any organisation, guide, contract, or owner specification.

CHANGE HISTORY

Scoring model revisions

v1.226 Sep 2026
  • Introduced severity and category weighting published below
  • Added preserved score recalculation history
  • Added schedule evidence snapshots for update intelligence
v1.123 Sep 2026
  • Expanded validation to 20 deterministic checks
  • Added six category scores and activity-level evidence
v1.020 Sep 2026
  • Initial PlanProof health score and XER validation model

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