Validation (Box period change)

Introduction

Changes in the Box start/end date 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 - they can always overlap.

Only "manual" and "auto top-down" Boxes can be sequential - if set to 'sequential', same level sequential Boxes can't overlap.

Box type period mode can affect if a new child Box can be created with a specified start/date.

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

An "auto top-down" parent →
- limits the period of an "auto top-down" child Box
- child Boxes in "manual"/ "auto scope-based" period mode are not affected
- "auto bottom-up" child overrides an "auto top-down" parent

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 Period of an "auto bottom-up" child unaffected ("auto bottom-up" child has priority over an auto "top-down parent") Periods of "manual" and "auto scope-based" Boxes unaffected
manual	unaffected (regardless of child period mode)