Project Management Professional Practice Question

In a forward pass calculation using the Critical Path Method, the Early Start (ES) of a successor activity is determined by the latest (or maximum) Early Finish (EF) of all its immediate predecessors. This rule ensures that all preceding tasks are completed before the successor task begins. In this scenario, the 'Begin User Interface Coding' activity has two predecessors with Early Finishes on day 15 and day 22. Therefore, the activity cannot start until both are finished, making its Early Start day 22.