Tested. Then tested again.
Calculations are checked against known answers and real schedule files. Repeatable tests help catch discrepancies as the analysis evolves.
For planners, project & program managers, owners, schedulers and delay analysts
Check any schedule properly, without uploading the file.
Schedule decisions deserve analysis you can rely on. Our calculations are repeatedly tested and validated, with findings traced to the activities behind them. Review your P6 or MS Project schedule with evidence you can inspect — and your file kept on your computer.
Start free — 14 daysExplore the dashboard ↗
Full access for fourteen days · no commitments or credit card required · plans from $15 USD/month · cancel any time
Repeatedly validated. Open to your scrutiny.Inside Trestle PathExplore all 25 screens
Explore the scheduleOverview
Quality & critical pathDCMA 14-Point Assessment
Changes & delaysDelay Analysis & Validation
Drawings & reportsLinear ScheduleScreenshots show selected areas of each section; the descriptions cover the full capabilities.
Confidence in every review
Accuracy is a discipline.
We put it to the test.
When a forecast informs a decision, the calculation behind it matters. Repeated validation and transparent evidence are part of how we build Trestle Path — so you can examine the basis for the results you use.
How the numbers are checkedBuilt from the source.
The critical-path network is analysed from activities and relationships. Re-scheduling works hour by hour on the schedule’s own calendars.
Results you can examine.
Follow findings to the underlying activities. Inspect the inputs and arithmetic, and carry the supporting evidence into your review and reports.
Your data stays yours.
Review with confidence in how your file is handled, too. Your file is read in your browser and stays on your computer; the calculations run on our service, and nothing you send is stored.
What does validation look like?A few examples from our checks+
Known-answer calculations
Earned Schedule mathematics is tested with reference cases whose expected results can be calculated by hand.
Consistency across views
Resource performance checks test that changing a chart from weeks to months does not change the position at the same comparison date.
Findings and reports reconciled
Delay-analysis counts are checked against the underlying change records. Duration and calendar checks also cover supporting registers and workbook outputs.
Assessed against
DCMA 14-PointGAO-16-89GAACE 29R-03 · 49R-06 · 52R-06 · 53R-06 · 78R-13PMI EVM Standard
A closer look
One dashboard.
Every angle of your schedule.
See the result. Follow the evidence. Explore the calculations, source activities and reporting tools behind a thorough schedule review. Each screenshot shows part of a section; the descriptions explain its full capabilities.
01 / 06 · 6 views
Explore the schedule
Overview
Start with the whole picture.
Every number is worked out again from the activities and links underneath — nothing is copied from what the file claims about itself. Each result is shown with the sums behind it, checked against the DCMA, GAO, AACE and PMI standards. The P6 XER or MS Project XML is read inside your own browser and is never uploaded.
Reading the first screen, explained →
Included fromAnalyst · $49 USD/month
Schedule Reader
Read the schedule in context.
The whole schedule as P6 shows it: WBS bands with rolled-up values, a row-aligned Gantt with baseline and float bars, drag-and-drop columns, filters and full screen.
Eight recipes for a monthly review →
Included fromReader · $15 USD/month
Activity Explorer
Find the activities behind the numbers.
Search and filter every activity in the schedule — dates, durations, float and progress — with float-path and critical filters.
Finding any activity, explained →
Included fromReader · $15 USD/month
WBS Breakdown
Find where the movement is concentrated.
Progress, criticality and risk sliced by area of work, with a prior-period comparison that shows where the movement is concentrated.
Included fromReader · $15 USD/month
Data Mapping
Know exactly what your review is built on.
The file’s audit trail: what it contained, what was carried into this review, what was held out of it and why — and the P6 settings that shape the answers on every other page.
What an MS Project XML carries →
Included fromReader · $15 USD/month
Load a Schedule
Your review starts with your file.
Twenty-four analysis sections and a 60+ tab evidence workbook, from a Primavera P6 XER or a Microsoft Project XML. No installs, no file uploads, no IT approval — the file is read in a browser tab, the calculations run on our service, and the review is back in about a minute.
Included inEvery plan · from $15 USD/month
02 / 06 · 6 views
Quality & critical path
Critical Path
Know what drives the finish date.
Recomputed from raw activities and relationships by the Longest Path method, with P6's Float Path 1 as the critical path — one consistent number on every page, chart and export. Continuity tested, near-critical bands exposed.
Critical, longest and float paths, explained →
Included fromReader · $15 USD/month
DCMA 14-Point Assessment
Put schedule quality to the test.
All fourteen checks with adjustable thresholds, the arithmetic exposed beside each result, and a drill-down to the exact activities behind every number — plus the GAO four-characteristic scorecard.
What the fourteen checks measure →
Included fromAnalyst · $49 USD/month
Weather Risk Matrix
Spot work in the wrong season.
Activities classified against a heavy-civil work-type library and plotted against regional climate normals, so work planned into the wrong season shows up before the season does.
Seasonal risk from a P6 schedule, explained →
Included fromAnalyst · $49 USD/month
Calendars
Check the working time underneath.
Which calendars the work runs on, their seasonal windows and exception days, each checked shift by shift against its own hours-per-day setting.
Hours per day and calendar changes, explained →
Included fromReader · $15 USD/month
Logic & Network Health
Understand the network behind the dates.
Open ends, dangling and isolated logic, leads and long lags, start-to-finish links, merge and burst points, duplicate relationships — the checks that decide whether the network means anything at all.
Five questions about the logic, explained →
Included fromAnalyst · $49 USD/month
Duration Analysis
Put the duration estimates to the test.
Long and zero-duration work, estimates heaped on round numbers, and actual-versus-planned accuracy from finished work: are the durations credible, and what changed since last month.
Testing the durations, explained →
Included fromReader · $15 USD/month
03 / 06 · 6 views
Changes & delays
Month-over-Month
Understand what changed.
Load last month's update alongside this one and every edit surfaces: dates pulled without cause, logic added and removed, durations cut, calendars altered, float eroded — with the story of why completion moved.
How to compare two P6 updates →
Included fromAnalyst · $49 USD/month
Delay Analysis & Validation
Four situations, four paths, one answer.
Start from what you are reviewing: a submitted time impact analysis against 52R-06, this month’s update, the delay over months in 29R-03 windows, or only a baseline and the as-built. Four steps to one number in one unit, with owner, contractor and neutral days kept apart, an issuable report and a workbook.
AACE 52R-06 · AACE 29R-03TIA and windows analysis, explained →
Included inExpert · $79 USD/month
Or as a module$15 USD/monthadds to Analyst; not available on Reader
Delay Absorption Stress Test
See how much delay the plan can absorb.
Inject a what-if delay into any activity and watch the float network absorb it. An hour-true CPM re-schedule on the schedule's own calendars shows exactly how many days a milestone can soak up before its date moves.
Absorption capacity against total float →
Included inExpert · $79 USD/month
Or as a module$5 USD/monthadds to Reader or Analyst
Interactive Logic Tracer
Trace the links around an activity.
Trace the driving chain behind any milestone hop by hop, through its predecessors and successors, and challenge a date with the exact link that produced it.
P6’s driving rule, explained →
Included fromReader · $15 USD/month
Relationships Forensic
Look closer at changing logic.
Every relationship added, removed, retyped or re-lagged between the two updates: see exactly which logic was rewired this period, link by link.
Every link added, removed or retyped →
Included fromAnalyst · $49 USD/month
Delayed Activities
See the whole overdue backlog.
The whole overdue backlog measured against the prior update, split into what fell due this period and what has been carried forward — including work quietly re-dated to "starting now" month after month.
The overdue backlog, explained →
Included fromAnalyst · $49 USD/month
04 / 06 · 2 views
Performance
Resource Performance (P6 only)
See the shape of the work.
Planned against actual units for any assigned resource — time-phased on the schedule's own calendars and P6 resource curves, and read at the exact data date rather than at the end of the month. Validated against a P6 Resource Usage Spreadsheet across 125 months. Pick several resources at once, summed or side by side.
P6 XER · Baseline At CompletionResource performance from a P6 schedule, explained →
Included fromAnalyst · $49 USD/month
Earned Value Management (P6 only)
Track performance against the plan.
SPI drifts back to 1.00 as a job finishes, so it stops discriminating exactly when you need it. Nominate the resource your project governs as progress weight and the position is answered twice: SPI by volume, and Earned Schedule as a date and a number of calendar days — which does not drift. Nothing is inferred; the page will not choose the weight for you, and every input, formula and curve inversion is shown.
P6 only · SPI · SPI(t) · SV(t)SPI and Earned Schedule, explained →
Included fromAnalyst · $49 USD/month
05 / 06 · 3 views
Drawings & reports
Linear Schedule
Connect the when to the where.
A CPM schedule knows when, never where. Drawn from your own location coding, this shows what occupies which stretch of the alignment, when, and at what rate — with clashes and production rates visible.
Editable on the page · Out as PowerPointA beginner’s guide to time-chainage →
Included inExpert · $79 USD/month
Or as a module$30 USD/monthadds to Reader or Analyst
Report Composer
Turn findings into a clear report.
Build the report this review needs: drag blocks onto a real page, resize and reorder them, and see where the page breaks fall. Fifty-seven blocks and seven starting layouts, from a monthly owner report and an executive one-pager to a claims pack and a DCMA submission; out to PDF, Word, PowerPoint or Excel.
PDF · Word · PowerPointIncluded fromAnalyst · $49 USD/month
Quality & Forensic Report
Bring the evidence together.
One click produces the whole review as an Excel workbook — every finding, every register, every changed relationship, each tab stating its purpose, the standard behind it and what to look for. Each analysis page has its own styled export as well.
What the workbook’s tabs hold →
Included fromAnalyst · $49 USD/month
06 / 06 · 2 views
Logic repairs
Dangling Logic Repair
Give disconnected logic a way forward.
Activities whose start or finish no relationship controls — a start with only FF/SF arriving, a finish with only SS/SF leaving. Each one is closed by writing the half of the pair the schedule already half-declares, with a lag that makes the new link exactly non-binding, so no activity date moves — and you download the repaired XER. Sold with the cleanser as one module.
Dangling and redundant logic, explained →
Included inExpert · $79 USD/month
Or as a module$5 USD/monthone module with the Redundant Logic Cleanser · adds to Reader or Analyst
Redundant Logic Cleanser
Make the network easier to read.
Find and strip "leapfrog" links the network already enforces elsewhere — the ones inflating logic density and sequestering float. Every removal is verified non-driving, and you download a cleansed XER with a report of what went.
How the cleanse keeps every date →
Included inExpert · $79 USD/month
Or as a module$5 USD/monthone module with Dangling Logic Repair · adds to Reader or Analyst
Choose your baseline — including MS Project's own
An MS Project file can hold eleven frozen baselines. All of them are read, with coverage and distance from the current plan stated — and the ones quietly re-set from today's schedule are flagged, because measuring against those makes every index read 1.00 for arithmetic reasons rather than performance ones.
Works on your phone and tablet
No P6 licence needed to check a schedule. Load an XER or XML on a phone — look up an activity, read the findings, review a report — on site, in a meeting, anywhere.
How it works
From the file to the findings
Twenty-four analysis sections and a 60+ tab evidence workbook, from a Primavera P6 XER or a Microsoft Project XML. No installs, no file uploads, no IT approval — the file is read in a browser tab, the calculations run on our service, and the review is back in about a minute. See a full review of the demonstration schedule →
Take the file
The Primavera P6 XER or Microsoft Project XML you already have — one you built, or one you were sent. No special export, no add-in, nothing extra to ask for.
Drop it in
Add last month’s update alongside it — every plan can, and that file becomes your baseline. Parsing and the mapping happen here, in your browser; the CPM re-schedule runs on our calculation service from anonymous numbers, in seconds.
Work the findings
Start at the Overview triage, then follow whichever flag matters. Inspect the supporting activities and arithmetic, so your review comments have evidence behind them.
Send it out
Compose the report you need and export it as a PDF, an editable Word document or a PowerPoint deck, with the evidence workbook attached when a finding needs backing.
All of it runs on a plan from $15 USD a month — see what each one includes.
Who it is for
One schedule, four different questions
The same analysis answers all of them. What changes is which side of the report you are on.
Contractors & planners
Check your own programme before you submit it, and fix what a reviewer would have found.
Owners & program managers
Read what you were sent, and know whether the date you are being given is supported.
Project managers
Find out what the finish date rests on before you report it upwards.
Consultants & delay analysts
Build the case with the sums and the activities attached to every finding.
Put the analysis to your own test
Fourteen days free. No commitments, no credit card, nothing to cancel.
Bring a schedule you know. Inspect the findings, trace the calculations and compare the evidence with your own review. Create an account and the whole platform opens for two weeks — every section, every export, on your own live schedules. If it is not for you, do nothing and it lapses on its own. If it is, choose the plan that matches how you work. You change it, add a module to it or cancel it yourself, from inside the dashboard, whenever you like.
Payments, sales tax and invoices are handled by Paddle as merchant of record for Trestle Path Analytics Corp. Prices in USD; tax shown at checkout. Fourteen-day refund policy — read it.
$15 USD/moReader — the schedule itself: Schedule Reader with Gantt, Critical Path & Float, WBS, Activity Explorer, Logic Tracer, Duration Analysis, Calendars and Data Mapping, with last month’s update loaded as the baseline.
$49 USD/moAnalyst — the monthly review end to end: Overview, DCMA 14-Point, Logic & Network Health, Month-over-Month, Relationships Forensic, Delayed Activities, Resource Performance, Earned Value, Weather Risk Matrix, the 60+ tab Quality & Forensic Report and the Report Composer.
$79 USD/moExpert — everything above plus Delay Analysis & Validation, Linear Schedule, Delay Absorption and the Logic Cleanser & Dangling Repair.
+$5 USD/moAdd-ons — take a single module instead of a whole tier, and drop it again when the job ends. Most attach to Reader or Analyst; Delay Analysis & Validation needs Analyst under it.
Teams & enterprise
Buying for a group? Two ways in.
More than one reviewer is a conversation, not a form. We set the licences up against your people’s email addresses, on one invoice, whether that is two of you or fifty — and from ten seats it is an annual term with purchase orders accepted.
2–9 seats
Email us and we will set the licences up for you — one invoice, activated against your people’s addresses, no per-person signup. There is no self-serve multi-seat checkout yet, so this is a short conversation rather than a form.
10+ seats, invoiced
Annual term, purchase orders accepted, no credit card and no per-person signup. We activate each licence against your people’s email addresses and hand you the list.
Data handling
Your schedule file never leaves your machine
Schedule files are read in your browser and never uploaded. The calculations run on our service from the numbers alone, which are never stored; your exports save straight to your own disk.
Your file stays with you
XER and MS Project XML files are never uploaded. Only the numbers a review needs go to the calculation service, held in memory while it calculates, then gone.
Accounts, not project data
Sign-in stores who you are and whether your access is active — never project content.
Contact
Questions? We'd love to hear from you
Evaluating the platform for a program, stuck on an analysis, or just want to talk schedules — send a message and we'll come back to you.
Email
Response time
We typically reply within one business day.