Controllers: open the field's update from the Pathizer Flowchart in one click, or import its .XER, then add the period's time impacts as fragnets under their own WBS.
P7 for project controls
Pathizer P7: CPM scheduling for construction project controllers and operations planners
P7 is Pathizer's free CPM scheduling tool. Project controllers use it to prepare each monthly update, add the period's fragnets and run the review meeting. Operations planners use it to mark the weeks ahead, read the work due in them and cap how many crews run at once. It opens .XER and .XML files and saves .XER.
P7 is a CPM scheduler at pathizer.com/p7. A project controller opens the update, adds the period's fragnets, presses F9 and reviews the float paths with the team. An operations planner draws a curtain over the weeks ahead and works from the activities it highlights. Both save .XER.
Use P7 from Claude or Codex
Your AI app on your computer, your schedule in your browser.
Claude Desktop and Claude Code
Claude Desktop installs the connector from one downloaded file. Claude Code adds it with one terminal command.
Codex
Add the connector with one terminal command, or in ~/.codex/config.toml. Needs Node.js 20 or newer.
A month in P7
From the field's progress to the review meeting, step by step
Open the update
On the Flowchart's Add Fragnets step, a Project Controller opens the update in P7, which asks to import it as a new project. Without Pathizer, File > Import .XER / .XML does the same.
Add the period's impacts
Add a Time Impact WBS with a fragnet for each weather day, RFI, change order or other delay, tied into the work it affects. Your AI app can do this from the prompt the Flowchart copies.
Schedule
Press F9. P7 computes dates, total float and the float paths from the logic, the durations and the calendars.
Check
Tools > Check schedule lists open ends, constraints, negative float, large lags and long durations. Fix them before the file goes back.
Plan the next weeks
Drag the data date line right to the last day of the lookahead. The activities with remaining work in those days are highlighted for the planners.
Run the review meeting
Apply the Review Meeting layout and walk the float paths in order with the team.
Save and send back
Export .XER and drop it on the Flowchart's Health Check step, where Pathizer scores it as the next update.
Who It Is For
For the people who run the schedule each month, and the people who plan the work it drives
Project controllersOperations plannersSchedulersSuperintendentsProject managers
What controllers and planners do in P7
Press F9 to schedule. Dates, total float and float paths change only on F9, so an edit never moves a float value until someone presses F9, or a row until F5 or F9.
Open the Review Meeting layout to show the remaining work banded by float path, in path order, on a week timescale sized for a projector.
Planners: drag the data date line to the right on the Gantt to draw a curtain. Every activity with remaining work inside it is highlighted in the table.
Cap how many activities of one resource, or of one activity code value, run at once with Resource Level in the Schedule dialog. Actual dates never move.
Filter, group and sort by WBS, activity code or float path, and save the view as a layout for next month.
Print the Schedule Report on tabloid paper, or have your AI app save it as a PDF.
Work in one shared folder with the rest of the team, with each person's changes showing for the others as they make them.
Definitions
Terms used on this page.
Curtain
A light yellow band on P7's Gantt from the data date to a day you pick, with a red line at its end. Activities with remaining work inside it are highlighted. It is your own view and is not saved in the schedule.
Float path
A chain of driving logic toward a milestone. Float path 1 has the least float, float path 2 the next, and so on.
More in the glossary: Critical Path Method (CPM), Multiple float paths, Look-ahead schedule, Fragnet, Schedule update, Resource leveling, Data date.
Practical Outputs
What you get.
A prepared monthly update, scheduled with F9 and ready for the health check
A float path view for the review meeting
A highlighted list of the work in the lookahead window
An .XER file and a printed or PDF Schedule Report
Related Workflows
Related pages.
FAQ
Questions from controllers and planners
A full scheduler. You build and change the EPS, WBS, activities, relationships, calendars, activity codes and resources, and F9 computes the dates. The Free Schedule Viewer only reads a file.
So everyone reads one result at a time. Edits change the inputs. Dates, total float and float paths change when someone presses F9, and the activity table sorts again on F5 or F9.
Yes. P7 needs no Pathizer account. Open or build a schedule, draw a curtain over the weeks you are planning, and filter or print what falls in it.
Resource Level in the Schedule dialog lets at most a set number of activities of the same resource, or of the same activity code value, run at once. Different groups never wait on each other, and actual dates never move.
In your browser only, one per project. It is not saved in the schedule, a layout or a shared folder, so each person draws their own.
P7 runs in your browser with no account, and your schedule stays on your device.
Open P7 Free Scheduling