Planning intelligence for construction

From P6 file to a defensible EOT claim, in an afternoon.

Chronaxis reads your baseline, programme updates, contract and correspondence, runs a contemporaneous windows analysis and writes the claim: report, tables and submission bundle.

Watch the 75-second demo
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Primavera P6 XER AACE 29R-03 · MIP 3.3 / 3.4 / 3.7 SCL Delay & Disruption Protocol
Windows analysis · Sample TowerEOT 91 days
TOTAL DELAY99 d
COMPENSABLE81 d
NEW COMPLETION08 Jun 26
W01W02W03W04W05
EmployerNeutralContractor
Sample project data, shown for illustration.
Reads Primavera P6 XERFIDIC 1999 & 2017 clause mappingAACE 29R-03 methodsRuns offline on your computerEditable Word, Excel & PDF outputs
Demo · 75 seconds

From P6 files to a finished claim.

The sample tower project from start to finish: analysis, window detail, Time Impact Analysis, notice compliance, programme checks and the report.

Chronaxis Claim · demo
Product tour

See it come together.

Every screen below is the real software running a sample tower project: a baseline, five monthly updates, five delay events, the monthly report and a target plan.

Chronaxis Claim
Chronaxis Claim home screen with options to start a new claim, continue a saved claim or open a sample project Windows analysis dashboard showing total delay 99 days, EOT claimed 91 days, compensable 81 days and charts per window Window detail with written narrative, key figures and a critical path comparison chart Delay events register with notice compliance against the contract notice period Monthly progress report overview with planned and actual progress, SPI, forecast finish, early warnings and the S-curve Target plan showing the activities to accelerate, crew increase and feasibility, with the activities kept as they are
The suite

One planning desk. Every module you need.

Built by planning engineers for planners, claims consultants and project controls teams who live in Primavera P6.

Chronaxis Claim

Extension of Time claims that hold up under review.

  • Contemporaneous windows + half-step
  • TIA, collapsed as-built and as-planned vs as-built cross-checks
  • Prolongation costs: Hudson, Emden, Eichleay
  • Contract clauses & notice compliance
  • Engineer review mode for consultants
  • Word report, Excel tables, PDF bundle
  • Every programme file the Engineer asks for: updates, half-steps, impacted XERs
FIRST TO LAUNCH

Chronaxis Report

Weekly and monthly progress reports straight from your P6 updates.

  • Project library: set up once, report every week or month
  • Planned vs actual, SPI, S-curve and trend
  • Recovery and mitigation curves against the baseline
  • Critical path, look-ahead, delayed work, site photos
  • Target plan: finish earlier, with the crews it needs and an XER for P6
  • PowerPoint with native charts + PDF
LAUNCHING WITH CLAIM

Chronaxis Baseline & Recovery

Build, check and defend the programme before and after delay.

  • Baseline quality checks
  • Recovery & revised programmes
  • Mitigation scenarios by target days
ON THE ROADMAP
Chronaxis AI · Expert plan

The engine does the numbers. AI does the writing.

Every date and day comes from the Chronaxis scheduling engine, which matches Primavera P6. AI reads those results and writes - it never changes a number. No setup: credits are included in the Expert plan.

For the claim

  • Cause and effect narrative for every event
  • Your claim reviewed as the Engineer would read it, weakest points first
  • A point-by-point reply to the Engineer's letter

For the report

  • Executive summary and areas of concern
  • Why the forecast moved since last month
  • Review of the target plan: crews, shifts, risks
  • Close-out report and lessons learned

Early warnings

  • Activities losing float before they turn critical
  • Critical work about to start but still waiting for approvals
  • Programme integrity: out of sequence, future actuals, cut durations, removed logic
  • Explained in plain words, at no credit cost
300 AI credits a month in ExpertA question = 1 credit · a full narrative = 3See every request and its costLetter templates work in every plan, without AI
How it works

Your files in. A submission-ready claim out.

01

Load the programmes

Baseline and monthly updates as P6 XER files, with automatic quality checks.

02

Add contract & letters

EOT, notice and delay-damages clauses detected; letters read and linked to delay events.

03

Run the analysis

Window-by-window critical path, delay allocation and concurrency, with a TIA cross-check.

04

Issue the claim

A professional Word report, Excel tables and a bookmarked PDF bundle with every exhibit.

AACE 29R-03 MIP 3.1, 3.3/3.4 and 3.8SCL Protocol (2nd ed.)Works offline on your computerYour project data never leaves your machine
What you submit

Outputs the Engineer can follow.

Claim report

A structured Word report: cover, contents, contractual basis, notices, window-by-window analysis, TIA cross-check, entitlement and appendices. Fully editable.

Tables & charts

Excel summary of windows, events, allocations and notices, with charts for forecast completion, delay per window and cumulative entitlement.

Submission bundle

One bookmarked PDF with the report, correspondence, contract extracts and supporting documents, separated by dividers and page-stamped.

Prolongation costs

Time-related site overheads and head-office overheads by Hudson, Emden or Eichleay on the compensable days, with live formulas in Excel.

Engineer's determination

Reviewing a contractor's claim? Claimed versus assessed days per event, review findings and a determination report from your own independent analysis.

Letters from your data

Notices of delay, claim submissions, requests for particulars and recovery programmes, drafted from the analysis and the contract clauses.

Your data stays yours. Programmes, contracts and letters are processed on your own computer and never uploaded to us.
Your method, your judgement. Every allocation can be adjusted, and the reason is printed in the report.
One licence, one computer. Licences are tied to a device and can be moved when you change machines.
Pricing · Chronaxis Claim

Simple plans. Cancel anytime.

Launch prices in US dollars. Founders keep an extra 30% off for as long as they subscribe.

Planner
$621/ year
Billed yearly · $51.75 a month
  • Contemporaneous windows analysis with half-step
  • Time Impact Analysis cross-check
  • Contract clause mapping and notice checks
  • Reads letters, e-mails and Word files
  • Word report and Excel tables
  • Letter templates filled from your data
  • Programme files (XER) for every window
  • Small "Prepared with Chronaxis" footer
Reserve Planner
Most popular
Professional
$1,251/ year
Billed yearly · $104.25 a month
  • Everything in Planner
  • PDF submission bundle with bookmarks and stamps
  • Prolongation costs (Hudson, Emden, Eichleay)
  • Collapsed as-built and as-planned vs as-built cross-checks
  • Engineer review mode and determination report
  • Text recognition for scanned letters
  • Clean reports with no Chronaxis branding
  • Priority support
Reserve Professional
Expert AI
$2,061/ year
Billed yearly · $171.75 a month
  • Everything in Professional
  • Chronaxis AI included: 300 credits a month, nothing to set up
  • Cause and effect narrative and Engineer's-eye review
  • Replies to the Engineer's letters
  • Early warnings on every update
  • Ask anything about your claim or report
  • Early access to new modules
Chronaxis AI goes live at launch Reserve Expert AI
Pay your way VisaMastercardAmerican ExpressApple PayGoogle PayPayPalCompany invoice & bank transfer

14-day free trial and a 14-day money-back guarantee on your first payment (refund policy). Secure checkout. VAT or sales tax is added where it applies, with a tax invoice for every payment. Companies on yearly plans can pay by invoice and bank transfer. Teams and multiple computers: hello@chronaxisapp.com. Chronaxis Report and the full Suite will be priced at launch.

Reviews

What planners say.

Reviews come from people who have used Chronaxis. We publish them as written, after checking they are genuine.

Chronaxis is in its founders phase. The first reviews from trial users and founding customers will appear here.

Share your experience

Used Chronaxis on a project or during the trial? Tell other planners what worked and what could be better. Your email is never shown.

Your rating
FAQ

Questions planners ask.

Which Primavera P6 files does Chronaxis read?

XER exports from Primavera P6 Professional and EPPM. Load the baseline and each programme update; Chronaxis checks every file for open ends, hard constraints, negative float, out-of-sequence progress and invalid dates before the analysis runs.

Which delay analysis methods are used?

A contemporaneous windows analysis (AACE 29R-03 MIP 3.3 and 3.4 with a half-step to separate progress from revisions), cross-checked with a Time Impact Analysis (MIP 3.7) using fragnets. The approach follows the SCL Delay and Disruption Protocol, 2nd edition.

Does my project data leave my computer?

No. Programmes, contracts and correspondence are read and analysed on your own computer. Nothing from your project is uploaded to us. The only online step is a short licence check.

Can I edit the claim report?

Yes. The report is a normal Word document with styles, a table of contents and numbered sections, so you can add your own wording, logos and exhibits. Every allocation decision can also be changed inside the software, and the reason is printed in the report.

Does it work with FIDIC and bespoke contracts?

Yes. Chronaxis reads the Conditions of Contract as PDF or Word and finds the extension of time, notice and delay damages clauses in FIDIC 1999, FIDIC 2017 and bespoke forms. You confirm the clauses and notice periods before they are used.

What do I need to run it?

A Windows 10 or 11 computer. Microsoft Word or LibreOffice is used to create the PDF bundle. A macOS version is planned.

Is there a free trial?

Yes, 14 days with every feature. Outputs made during the trial carry a watermark, so they cannot be submitted until you subscribe.

How can I pay?

By Visa, Mastercard, American Express, Apple Pay, Google Pay or PayPal through a secure checkout. Companies on yearly plans can also pay by invoice and bank transfer. Every payment comes with a tax invoice, and VAT or sales tax is added where it applies.

Can I cancel at any time?

Yes. Cancel in one click and your plan stays active until the end of the period you paid for. Founder pricing stays with your subscription for as long as it runs.

Do you offer team and company licences?

Yes. Each licence covers one computer and can be moved when you change machines. For several users, a yearly invoice or a custom agreement, write to hello@chronaxisapp.com.

Founders offer

Be one of the first 50.

Founding customers shape the product with us and keep their launch discount for as long as their subscription runs. Join the list and we will email you once, the day Chronaxis opens.

Reserve my place
For the first 50 customers
30% off
for life, on any plan
  • Priority onboarding
  • Direct line to the product team
  • Early access to new modules