Name of parameters (shown on the tool tip)

Start Time of the task (Base) 

Type of the field

Calendar Control

Short name (shown in the header)

Start Base

Description

Base Start Time is used to calculate baseline project schedule. It also used to calculate start time of each iteration of the probabilistic calculation. Note that in most cases, the Start Time is calculated automatically based on predecessor’s finish time and lag. If a task does not have predecessors, the default start time is the current time or default start time from options (see “RiskyProject calculation and display options”). If you update the Start Time, the Constraint is set to “Must Start On”. See “Start, Finish Times, and Constraints” for more details. 

Related Fields

Start Time High - baseline 

Start Time Low - baseline