Our schedule ignores holidays and part-time staff. How do we correct it?
Invalid working calendarsRebuild dates using actual working calendars and availability. A mathematically linked schedule is still wrong when its calendars assume people are available when they are not.
What to do now
- Collect relevant working calendars
- Record leave and part-time availability
- Recalculate affected task dates
- Confirm revised commitments with owners
When to escalate
Escalate when
The corrected calendar causes a material milestone breach.
Who decides
The project manager and relevant commitment owner
Example
A ten-day task assigned to a half-time specialist spans approximately four working weeks before other constraints.
Mistake to avoid
Counting calendar days as working days without agreement.
Prevent a repeat
Compare forecast versus actual results for comparable tasks, separating effort, elapsed time, waiting and scope change.
Suggested ApprovedFlow setup
- Tasks
- Timesheets
- Resources
Keep planned dates and assumptions with the affected task, compare recorded actuals, and attach the revised forecast for review. See the platform
Related cases
- Every task is on time, but the project is late. What are we missing?Missing schedule relationships
- A task finished early, but nobody used the time gained. Why?Unmanaged schedule opportunity
- Our budget ignores internal staff time. Should we include it?Incomplete cost visibility
- The procurement process will finish after the required start date. What can we do?Procurement lead-time mismatch