CAPM Practice: Demonstrate an understanding of a project management plan schedule

A positive lag in an FS dependency adds a waiting period. The successor activity cannot start until 3 days after the predecessor finishes. Common examples include waiting for concrete to cure, paint to dry, or approvals to be processed before the next activity can begin.

**Why not A:** Starting 3 days before the predecessor finishes describes a lead (negative lag), not a positive lag. A lead accelerates the schedule by allowing overlap, while a positive lag delays the start of the successor after the dependency condition is met.

**Why not C:** Three days of overlap between activities would describe a lead or negative lag in an FS relationship. A positive lag of 3 days creates a waiting period after the predecessor finishes, not an overlap during which both activities execute simultaneously.

**Why not D:** The predecessor finishing 3 days early is a schedule performance outcome, not a dependency definition. The lag defines a mandatory waiting period after the predecessor finishes, regardless of whether the predecessor finishes early or late.