Review Primavera P6 schedules
with transparent, independent checks
Check your Primavera P6 XER, see which activities need attention, and download clear PDF and Excel reports. Your file stays in your browser during PlanProof Quick Check.
Validate your P6 schedule
Your XER stays in this browser. Sign in only when you choose to save reports.
- 20 diagnostic checks
- PlanProof Quick Check · Browser-local
- Free tools with no expiry
Watch how PlanProof works
60 seconds, start to finish.
Prefer reading? See the methodology page for the full breakdown.
Video transcript
Every construction schedule hides risks. Missed logic, impossible float, broken calendars — the faults that blow up programmes months later.
Finding them in Primavera P6 means digging through XER files, filters and spreadsheets. Slow, inconsistent, and hard to defend in front of a client.
PlanProof is a free set of schedule review tools. Upload your P6 XER, and it runs twenty transparent diagnostic checks — open ends, float, constraints, progress integrity, and more.
Your file never leaves your browser during the quick check. You get a quality score, activity-level evidence behind every finding, and clear guidance on what to fix.
Every rule is published. Every limitation is disclosed. Download PDF and Excel reports, compare updates over time, and keep a full audit trail in your private workspace.
Free tools. No expiry. No card required. Visit planproof.co, and validate your schedule today.
A complete schedule review—open to inspect.
Explore a synthetic XER with known issues and a revised teaching sample. The score, category movement, activity evidence and downloads are produced by the same engine used for customer schedules.
Open the interactive sampleSee exactly what happens after upload.
These live previews use the same versioned synthetic samples as the demo and downloadable reports.
12 finding groups
Incomplete activities have open ends
A160Multiple unconnected starts detected
A160Multiple unconnected finishes detected
A16012 → 0 finding groups
Open the change register. No sign-in needed.
Schedule assurance built around evidence.
PlanProof gives planners a repeatable review process: diagnose the current update, prove every exception at activity level, compare movement between submissions, and retain an audit trail in one private workspace.
PlanProof Quick Check
Test open ends, float, constraints, durations, actual dates, progress integrity, calendars, relationship structure, leads, lags and corrupt logic.
Inspect every checkCompare XER Updates
Measure health-score movement, activity and relationship changes, category performance, and the exact finding groups that improved or deteriorated.
Open Compare XER UpdatesPlanProof Workspace
Keep a private register of every validation with score trends, critical-exception totals, data dates, activities, reports and comparison access.
Sign in to open the workspaceReports that show the evidence
Move from a headline score to affected activity IDs, names, values, severity and practical corrective guidance. Export the record to PDF or Excel.
Read the scoring method
Built for the people who must explain the schedule.
Schedule reviews often happen under deadline pressure, inside complex XER files, with findings scattered across filters and spreadsheets. PlanProof turns that review into a repeatable evidence trail.

For industries that run on complex schedules.
PlanProof evaluates Primavera P6 XER structure rather than industry-specific commercial rules. That makes its diagnostic workflow useful wherever teams need explainable schedule-quality evidence.
Construction
Buildings, mixed-use and major programmesOil & Gas
Facilities, shutdowns and EPC deliveryInfrastructure
Transport, utilities and public worksEnergy
Generation, transmission and renewablesIndustrial
Manufacturing and process facilitiesData Centres
Fast-track technical constructionFrom thousands of activities
to the risks that matter.
PlanProof reads the source XER without recalculating or modifying it, applies a disclosed rule set, and produces a prioritised action list.
Upload
Bring a Primavera P6 XER export up to 100 MB. The raw schedule is processed in memory and discarded.
Analyse
We parse activities, relationships, calendars and project controls, then apply 20 schedule integrity checks.
Act
Receive saved activity-level evidence, prioritised corrective guidance, update comparisons, PDF and Excel reports.
One upload starts the review.
History makes it powerful.
Every validation becomes part of a private workspace where planners can track schedule quality, compare updates, investigate activity-level evidence, and export professional reports.
- Portfolio metrics and score trends
- Update-to-update category and finding comparison
- Activity evidence, corrective guidance, PDF and Excel
Use PlanProof freely.
Buy the bundle when it helps.
No trial clock, card requirement or monthly validation quota. Learn the workflow with free tools, demonstrations and practical guides.
Free tools
For every planner, every review.
- PlanProof Quick Check and XER Schedule Viewer
- Local update comparisons and Progress Measurement Sheet (PMS)
- PDF, Excel and CSV exports
- Free PlanProof Workspace with sign-in
- No monthly limits
Professional bundle
For teams ready to apply a repeatable review process.
- Schedule review & action register
- Update comparison & monthly narrative
- Resource-progress reconciliation
- Recovery review checklist
- Scoped team walkthrough
- PMS sheet in Excel
Practical guides
Five focused lessons, each linked to a working demonstration.
- Open logic and progress integrity
- Schedule comparisons
- Resource-weighted progress
- Recovery readiness
The optional bundle never unlocks or limits the tools. Prices, scope and delivery are agreed before any bundle payment. Technical file-size and service-protection limits still apply.
Evidence you can reproduce.
Download controlled XER fixtures, compare expected findings with actual results, and inspect the known limitations.
Open accuracy evidenceOne practical guide. One working demo.
Start with open logic, then work through progress, comparisons, resource weighting and recovery reviews.
Read the five guidesEvery flag must be explainable. Every limitation must be visible.
PlanProof was created by Muhammad Akhtar to make rigorous schedule review more transparent, accessible and useful to the people responsible for the plan. We publish the diagnostic rules, show the triggering evidence and clearly mark what the platform does not evaluate.
Questions, edge cases and methodology feedback are welcome at support@planproof.co.
PlanProof is independent software and is not affiliated with Oracle, the U.S. Department of Defense, or the Defense Contract Management Agency.Questions serious review teams ask.
Does PlanProof modify or recalculate my schedule?
No. PlanProof is read-only. It parses the exported XER and evaluates the supplied data without changing dates, float, logic or calendars.
Which schedule formats are supported?
The production validator currently supports Primavera P6 XER. Microsoft Project MPP and Asta Powerproject PP remain planned and are not advertised as available.
What is included in each validation?
Health and category scores, prioritised findings, affected activity evidence, severity, corrective guidance, saved history, and downloadable PDF and Excel reports.
How is this different from a generic file checker?
PlanProof retains the diagnostic result, tracks quality over time and compares two submissions to show which risks appeared, improved or remained unresolved.
Is the score a DCMA certification?
No. It is a transparent PlanProof quality indicator informed by widely used schedule-review principles. It is not a contractual certification or a substitute for an owner-specific specification.
Can PlanProof replace a planner's judgement?
No. It accelerates evidence gathering and prioritisation. Contract requirements, accepted exceptions, project context and professional judgement remain essential.