Constraints impose specific conditions on schedule events or activities, such as fixed start dates or imposed milestones.
These are external to the natural logic relationships established in a network (e.g., predecessor-successor relationships).
PSP Study Guide References:
The guide describes constraints as independent factors that override logic-based sequencing when necessary.
Analysis of Options:
Option A and C: Constraints impact both forward and backward passes, not exclusively one.
Option D: Constraints supersede activity logic rather than being overruled by it.
Conclusion: The correct answer is B, as constraints operate independently of project logic relationships.
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