Total row of a duration column linked to timeline should have an option to show a total span of the linked timeline. Sum function currently shows a simple sum of individual durations, which is not a total span if there are overlapping activities or activities with gaps.
Hey @Jirka - great observation! The native Duration column sums individual durations, but doesn’t reflect the actual span of the timeline if overlaps or gaps exist.
You might want to check out our new Smart Timeline + Duration app, it lets you automate start and end date syncs and could be used to dynamically calculate the earliest start and latest end across items (to reflect the true span). While we don’t yet calculate group-level spans natively, we’re exploring it as a future enhancement based on feedback like this.
Feel free to take a look: Smart Timeline + Duration – happy to show you a demo too if helpful!