4D Sequencer

Play your schedule on the model.
Then let it check the schedule for you.

4D Sequencer plays your Primavera P6 or Microsoft Project schedule on the IFC model, finds impossible sequences, runs 12 schedule quality checks and exports PowerPoint, Excel and video reports.

Windows 10 and 11 · 7-day free trial · no account needed

4D Sequencer showing a building model, the schedule checks and the Gantt chart side by side

Built for planning engineers who review programmes

Open an IFC model and a schedule. 4D Sequencer links the model elements to the activities automatically.

Finds impossible sequences

Reads the model to find work that starts before the element it stands on, sits in or hangs from is finished: columns before the slab under them, doors before the wall around them, ceilings before the slab above. Each finding is shown on the model.

Impossible sequence check shown on the model

Checks the baseline

12 standard quality checks: missing links, negative and positive lags, Start-to-Finish links, hard constraints, high and negative float, long durations, invalid dates and out-of-sequence progress. Export them as numbered review comments in Excel, ready to send back to the contractor.

Schedule quality checks

Plays the schedule day by day

Watch the project being built with the Gantt chart moving in step. Works with Primavera P6 (XER and XML), Microsoft Project XML, Excel and CSV schedules.

Schedule playing on the model

Shows delays on the model

Baseline against actual, with late work in red and early work in green, or both side by side in split view.

Delays shown on the model

Compares revisions

Load an earlier revision or update and see what slipped, what improved, what was added or deleted, and which links changed.

Revision comparison on the model

Reports in one click

PowerPoint, Excel, an interactive web report and an MP4 video of the sequence.

Cost and cash flow

Budget, spent to date and forecast at completion from Primavera P6 resource costs.

Your files stay with you

No account, no sign-in, no tracking. Everything runs on your computer and works offline.

Simple pricing

Download free from the Microsoft Store and try everything for 7 days. Then choose a licence. One payment, no subscription.

1 year licence

$150
  • Works for 1 year from purchase
  • One payment, no automatic renewal
  • All features and updates
Buy 1 year licence
Best value

Permanent licence

$400
  • Never expires
  • One payment
  • All features and updates
  • Costs less than 3 years of yearly payments
Buy permanent licence

Prices include tax where it applies. Secure payment by Polar. Your licence key is emailed to you within 24 hours.
Already have a 1 year licence? Upgrade to permanent and pay only the difference: email us.

How buying works

No account to create. Your key is yours.

Try it

Install from the Microsoft Store. The 7-day trial starts when you first open it.

Buy a licence

Click Buy here or inside the app. Enter the name to show on the licence: yours or your company's.

Get your key

Your licence key arrives by email within 24 hours.

Activate

In 4D Sequencer, click "Enter licence key", paste the key and press Activate. No internet needed.

Questions

Anything else? Email rawifystudio@gmail.com

Which files can I open?

Models in IFC format. Schedules from Primavera P6 (XER or XML), Microsoft Project (XML), Excel or CSV.

Does it need the internet?

No. 4D Sequencer runs on your computer and does not upload your files anywhere. Activation also works offline.

What does it need to run?

Windows 10 or 11 (64-bit) with Microsoft Edge, which is part of Windows, or Google Chrome.

Can my company pay and get an invoice?

Yes. At checkout, tick "I'm purchasing as a business" to add your company details. Your receipt and invoice can be downloaded from the customer portal at any time.

Can I get a refund?

Yes, within 14 days of purchase if your licence key does not work and we cannot fix it. See the terms and refund policy.