A typical run — import to report

The whole method is the tab order. One pass through the six tabs takes a schedule from "the plan says 24 Aug" to a defensible P80 with the drivers ranked and a print-grade report — this is the cycle every other guide hangs off.

1. Import the schedule. On 1 Import, drop a Primavera P6 .xer or PMXML, an MS Project .xml, or a plain CSV/TSV task list (ID, Name, Duration, Predecessors — the download CSV template link shows the exact shape; Asta users export a task list to CSV). The Fitness Gate then grades the file against the full DCMA 14-point check and prints READY for QSRA, READY WITH CAVEATS or NOT RECOMMENDED with every finding listed. The gate is advisory — you can always run — but its verdict prints in the report, so fix what you can at source.
2. Read the schedule. The app lands on 2 Schedule: a read-only Gantt with WBS grouping, ⟶ Links, ⚡ Critical and ⟶ Longest Path overlays, look-ahead and code filters, and a detail panel on double-click. This tab is for verifying you risked the schedule the planner actually issued — durations and logic are never edited here, only re-imported.
   The demo passes the gate at 100/100; critical activities read amber down the register-style listing.
3. Build the Risk Register. On 3 Risk Register, click + Add risk per discrete event: name, Owner, type (threat / opp), probability (0–1), an impact distribution (triangular, pert, trigen, uniform, normal, lognormal, discrete) with min / likely / max in working days, an optional Cost £ impact, and the activities it Maps to. Already have a register in Excel? Copy puts the table on the clipboard, pasting a tab-separated block bulk-adds by ID, and CSV ▾ exports a blank template or imports a populated one. ✨ Suggest mappings proposes register→activity links by text similarity — deterministic and explainable, no AI.
   The demo register: five risks with owners, P·I screening scores, quantified impacts — note the Mode column, where fragnets and branches live (guides 04–06).
4. Set the Ranges. On 4 Ranges, pick a calibration preset — Conservative (−5/0/+10%), Typical (−10/0/+25%) or Aggressive (−15/+5/+40%) — then override any activity's three-point band or distribution in the table. (Yes, "Conservative" is the narrowest band — it's conservative about the estimate, not the outcome.) Per-group overrides let different WBS branches carry different uncertainty; the cost columns (Cost £k, C.min / C.likely / C.max) feed the QCRA layer.
   One preset applies a standard spread to everything; override where you know better. Weather and correlation (guides 07–08) live here too.
5. Run. Set the seed (write it down — it makes every number reproducible), pick iterations, optionally tick LHS for stratified sampling, and press ▶ Run Monte Carlo or ⌘/Ctrl ↵. Two thousand iterations on the demo takes under a second.
6. Read the results. 5 Results opens on the four tiles — Deterministic, P50, P80 ("the contractual number"), P90 — above the completion distribution and S-curve. Below: the driver tornado (six views — Risk drivers, Sensitivity, Cruciality, SSI, Cost, Variance), the criticality index, measured risk paths, milestone confidence, cost risk with the JCL football chart, and probabilistic cash flow. 📌 Snapshot this run pins any run for side-by-side comparison; the footer prints a convergence check and a reproducibility certificate anyone can Verify.
   The plan said 24 Aug 2027. The simulation puts that at P2 — and names the two risks buying most of the 94-day gap.
7. Generate the report. 6 Reports offers five deliverables, each a Generate button: the full QSRA / QCRA pack, a one-page Executive Brief, the Risk Register report (no run needed), NEC programme risk (Time Risk Allowance framed for NEC4 ECC clause 31.2), and Mitigation & Contingency. Tick sections on or off in Report contents & options, set analyst / organisation / logo in Report settings, and print to PDF from the browser. Every page carries the seed and engine version, so every number is checkable.
   Five deliverables from one run. Free-tier reports carry a DRAFT watermark; the content is identical.