What is the initial step in forward scanning?

In forward scanning, the initial step involves labeling the start vertex with zero. This is crucial because it establishes a reference point for calculating the total time taken to reach other vertices in the network. By marking the starting point with a value of zero, it allows for a clear progression through the graph as the algorithm processes each activity in the sequence, accumulating time along the way.

Labeling the start vertex helps in determining the earliest start times for each subsequent activity. From this point onward, you can evaluate the total time required for all activities connected to the start vertex, moving through the network in a forward direction to compute the accumulated times. This approach is fundamental to project scheduling techniques, such as the Critical Path Method, where establishing a baseline time from the start is vital for accurate planning and resource allocation.