Activity changes
Find activities added or deleted, descriptions revised, original durations changed, and actual start or finish dates added.
Primavera P6 schedule comparison
See exactly what changed between two XER schedule updates
Compare baseline, prior, and current Primavera P6 schedules without reading a field-by-field change dump. Focus on the activity, logic, duration, float, calendar, and longest-path changes that can alter the completion forecast.
Changes organized by meaning
A readable schedule comparison for reviewers and project teams
Schedule Tracker groups differences into focused reports. Reviewers can distinguish normal progress from changes to scope, sequencing, logic, duration, calendars, and the activities driving project completion.
Logic changes
Review predecessor and successor relationships added or deleted, including relationship type and lag details.
Calendar changes
Identify activities assigned to a different calendar between schedule versions.
Activities becoming critical
Find activities that became critical and compare their previous and current total float.
Progress status
Compare percent complete, actual dates, original versus actual duration, and activities that missed planned dates.
Compact output
Copy focused tables into schedule narratives, progress reports, meeting notes, and review correspondence.
Driving sequence visibility
Compare the longest path, not just finish dates
A completion date can remain unchanged while the activities driving that date move elsewhere in the schedule. The Longest Path Comparison shows activities newly entering the path, activities leaving it, their dates, and total float.
New on path
Activities that became part of the driving sequence
Removed from path
Activities no longer controlling the same completion path
Float movement
Old and new flexibility around critical work
Comparison report catalog
The schedule differences reviewers ask for most
- Project Progress StatusOverall progress and duration performance
- Longest Path ComparisonActivities entering and leaving the driving path
- Activities Added or DeletedChanges to scheduled scope
- Predecessors Added or DeletedIncoming logic modifications
- Successors Added or DeletedOutgoing logic modifications
- Activity Descriptions ChangedOld and new activity names
- Original Durations ChangedOld and new planned durations
- Activities Became CriticalOld and new total float
- Relationship Lag ChangedOld and new lag values
- Activity Calendars ChangedOld and new calendar assignment
- Actual Dates AddedNew starts and finishes in the update
- Original vs. Actual DurationCompleted work that differed from plan
Frequently asked questions
Practical answers for P6 schedule reviewers
Can I compare a P6 baseline with a current schedule update?
Yes. Import the baseline and current XER files into the same Schedule Tracker project, then select the two schedule versions to compare.
Which changes does the comparison identify?
Reports identify activities and relationships added or deleted, description changes, original-duration changes, calendar changes, lag changes, new actual dates, activities becoming critical, and longest-path movement.
Does the comparison show changes to the longest path?
Yes. The Longest Path Comparison shows activities entering or leaving the driving sequence together with their dates and total float.
Can Schedule Tracker preserve more than two updates?
Yes. A project can preserve successive XER updates so you can compare selected periods and review milestone, progress, cost, and completion trends across the project history.
Replace the change dump