Vertical Schedule Integration
EVM Terms
Reviewed by forProject Technology - updated Sep 2026
Quick definition: Vertical Schedule Integration is the practice of tying higher-level summary schedules to lower-level, detailed schedules so that data is consistent across all levels of the project's schedule hierarchy.
It confirms that summary schedules and their supporting detailed schedules and work plans tell the same story, including consistency across WBS elements and, where applicable, IMP/IMS elements. This is distinct from Horizontal Schedule Integration, which checks logic ties across activities at the same level.
Why it matters
Without vertical integration, a summary schedule could show a healthy finish date while the detailed work underneath tells a very different story. Checking it helps confirm that every level of the schedule genuinely supports the overall program schedule requirements.
Also known as
N/A
Used in
Integrated Master Schedule reviews and schedule health assessments
See also
FAQ
How is Vertical Schedule Integration different from Horizontal Schedule Integration?
Vertical integration checks consistency between summary and detailed schedule levels, while horizontal integration checks that logic ties connect properly across activities at the same level.
Why would a schedule fail vertical integration?
If a summary schedule shows dates or status that don't match what the detailed schedules underneath it actually support.
Definition maintained by forProject Technology.
© 2026 forProject Technology, Inc.
© 2026 forProject Technology, Inc.
