Desktop application for rigorous, Monte Carlo-powered cost and schedule risk analysis of highway construction projects.
Improving the reliability of project estimates one analysis at a time
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PRBE automates the NHI Course 134205 methodology, bringing rigorous probabilistic analysis to every project team.
Run thousands of iterations with configurable parameters, convergence monitoring, and reproducible results via random seed control.
Interactive PDF and CDF charts for total cost (current year and year-of-expenditure) and project completion date with percentile analysis.
Identify which risk variables have the greatest influence on cost and schedule using Spearman rank correlation tornado charts.
Understand which risks drive extreme outcomes with fire rate comparison, excess contribution metrics, and plain-language interpretations.
Model Better-Than-Planned, As-Planned, and Worse-Than-Planned market scenarios with probability-weighted cost multipliers.
Define cost-cost, schedule-schedule, and cross-type correlations using a Gaussian copula for realistic multi-variable modeling.
Convert current-year costs to year-of-expenditure dollars with customizable inflation tables and phase-segment predecessors.
Comprehensive risk register with customizable views (Brief, Standard, Full), CSV/Excel export, and print-optimized layouts.
Import risks from Excel templates, export risk registers, and backup/restore complete projects for transfer or archival.
A modern, browser-based interface that's powerful yet intuitive. All data stays local on your machine.
Organize multiple projects with an intuitive dashboard. Create, duplicate, and manage projects with full backup and restore capability.
Define risk events with probability distributions, dependency types, and detailed documentation. Import risks directly from Excel templates.
Get clear, defensible budget recommendations with detailed statistics for current-year and year-of-expenditure costs.
Pinpoint exactly which risks matter most with tornado charts and tail driver analysis, so teams can focus mitigation where it counts.
PRBE implements the National Highway Institute (NHI) Course 134205 framework for risk-based estimating in transportation projects.
Set up segments, phases, and cost categories that match your project scope.
Input cost and schedule data with variability ranges for each phase-segment.
Add risk events with probability distributions, correlations, and market conditions.
Execute Monte Carlo analysis and review distribution charts, tornado diagrams, and tail drivers.
Start with a free 90-day trial. Your license never expires — the app keeps working forever.
Perpetual use of any PRBE build released in your first 12 months. The app keeps working forever on versions you're entitled to.
Free 90-day trial included with download. Up to 3 projects during trial.
Already a customer? Extend your upgrade coverage another 12 months for half price. Renew anytime — there's no lapse penalty.
Your Machine ID is visible in the top bar of the app once it is licensed.
Everything you need to know about PRBE licensing.
A perpetual license to any PRBE build released within the 12 months after your purchase. The app you install never stops working — there's no subscription, no phone-home, no auto-renew.
Your installed PRBE keeps working forever. If we release a newer version and you want it, renew for $14.99 to get another 12-month upgrade window. If you don't care about new versions, do nothing — your current build is yours.
Only access to newer releases. No features get disabled, no projects become inaccessible.
Licenses are bound to a Machine ID. Email support and we'll reissue at no charge.
Yes — contact us within 30 days if PRBE isn't working for you.
No. Renewals are optional and manual. You control when (or whether) to extend.
No. Customers who purchased before the upgrade-window model was introduced keep lifetime access to all future versions — no renewal needed, ever.
PRBE was created by Michael Smith following his retirement from the Federal Highway Administration in 2023, where he spent 32 years advancing quantitative risk assessment for highway infrastructure projects.
The application implements the methodology taught in the National Highway Institute (NHI) Course 134205, making rigorous probabilistic cost and schedule estimating accessible to project teams without requiring specialized statistical software.
PRBE is a standalone desktop application that runs entirely on your local machine. It launches a local server and opens in your web browser, requiring no cloud connectivity or external dependencies. All project data remains on your computer, ensuring complete data privacy and security.
Compatible with Microsoft Windows. Chrome, Edge, or Firefox recommended for the best experience.