From the first XER import to a P80 deliverable your planner can open in P6 — twelve short guides, each one driven in the real app and screenshotted along the way. Everything here runs on the free tier, in your browser, with nothing uploaded anywhere.
The full QSRA/QCRA cycle in one pass: import a P6 XER, gate it, build the register, set ranges, run the seeded Monte Carlo and generate the report pack.
Open the guide →The month-two problem solved: drop the new XER over the loaded risk model and the re-link banner carries risks, ranges and correlations across — minutes, not a rebuild.
Open the guide →Model risks that insert new work — a failed inspection, a late consent — as delay injected after the mapped activity, propagating through the network logic.
Open the guide →When the uncertainty is which way, not how long: mapped activities become alternative paths, one taken per iteration, untaken branches dropping out entirely.
Open the guide →The branch taken exactly when an earlier risk fires — wire "design review fails" straight to the re-work path with one extra dropdown.
Open the guide →A percentage of working days lost per calendar month, sampled each iteration — with a date-aware mode that catches work slipping into winter.
Open the guide →Groups with one ρ for a shared crew or window, pairwise Iman–Conover for the exceptions — and a consistency check that refuses impossible matrices.
Open the guide →Send each risk owner a self-contained review file that edits in any browser — no licence, no account — then merge the returns change by change on the Workshop board.
Open the guide →Turn the run into files the project uses: P80 dates as CSV for Excel, and a P6-importable XER with every duration at its simulated P80.
Open the guide →Roll several projects into one completion and cost picture by resampling stored distributions — with a systemic-ρ slider for the shared driver.
Open the guide →P(late) × rate per milestone, straight off the simulated distributions: expected LD and the P80 exposure, per milestone and totalled.
Open the guide →Record each monthly update and watch the P80 trend, risk burn-down and a hindcast that grades whether your QSRAs are actually calibrated.
Open the guide →The app is six numbered tabs — 1 Import 2 Schedule 3 Risk Register 4 Ranges 5 Results 6 Reports — worked left to right. The run bar at the bottom (seed, iterations, ▶ Run Monte Carlo) is always in reach.
Your model lives in one file — a .riskproj Risk File, saved with Save and reopened with Open. Schedule, register, ranges, correlations, LD rates, tracking log, report settings: all of it. The app also autosaves to your browser and restores the last session on reload.
Nothing leaves your machine. Schedules are parsed in the browser; simulation runs in the browser; reports are generated in the browser. Same file, same seed, same result — every run is reproducible, and the results view prints a certificate to prove it.
Keyboard: ⌘/Ctrl S saves the Risk File, ⌘/Ctrl ↵ runs, ⌘/Ctrl P opens the report. The free tier caps runs at 2,000 iterations and watermarks reports — every feature on this page works without a licence.
No schedule to hand? Every guide below works with the built-in demo — ▶ Load demo project (Tower C — Substation & Civils) on the Import tab — or the downloadable files from the Examples page.
The Examples page has three complete case studies with every file downloadable — reproduce the numbers, then swap in your own schedule. The Maths documents every formula these guides lean on, from merge bias to Iman–Conover, and Benchmark runs the seeded engine check in your own browser. Questions these guides don't answer: hello@runmontecarlo.com.