A PERT network consists of activities linked by arrows. Suppose two of the activities on the network are labeled "A" and "B." An arrow from "A" to "B" indicates that

Task A must be completed before you can start with task B.

Explanation:

A Program Evaluation Review Technique (PERT) network is a project management technique used to schedule, organize and coordinate tasks. It was first developed by the navy during the 1950s as a way to manage their submarine missile program.