The three time estimates for the activities of the network shown in the given figure are shown above their arrows. The earliest expected time for the event 4, is

Construction planning is the specific process a construction manager uses to lay out how they will manage and execute a construction project, from building design to completion. It lists the activities and schedule for each part of the construction process.

Construction management involves planning, budgeting, coordinating, and supervising construction projects from start to finish.

A construction manager may work on various construction projects, including buildings, roads, bridges, and other structures.