Validation (Box Period Change)

Introduction

Changes in the box start or end dates trigger a validation check.

Sequentiality settings affect same-level boxes (can potentially prevent box periods from overlapping).
Auto bottom-up and auto scope-based boxes are never sequential (can always overlap).
Only manual and auto top-down boxes can be sequential.

Newly created boxes do NOT have any children and cannot be affected by children.

Boxes in an auto bottom-up period mode are affected by the period of children (regardless of a child period mode).

Effects of the parent box period mode on a child box period are outlined in the table below.

Parent box →	Box period

Parent box →	Box period
Auto bottom-up	Unaffected (regardless of child period mode).
Auto scope-based	Unaffected (regardless of child period mode).
Auto top-down	An auto top-down parent limits the period of an auto top-down child. The period of an auto bottom-up child is unaffected (an auto bottom-up child has priority over an auto top-down parent). The periods of manual and auto scope-based boxes are unaffected.
Manual	Unaffected (regardless of child period mode).