Two tables are included
which identify the common terminology used for Earned Schedule
(ES). Table 1 indicates the accepted EVM terminology for cost
and then displays, comparatively, the ES terminology for an
analogous measure or indicator.
![EVM and ES terminology](Images/ES-Terminology-1.jpg)
Table
1
The second table breaks down the ES terminology to measures,
indicators, and predictors. The terminology depicted in this
table has a few terms requiring definition:
PD = Planned Duration
ED = Estimated Duration
PF(t) = Performance Factor (time-based)
The time-based performance factor is analogous to the PF used
in the EVM IEAC equation.
![](Images/ES-Terminology-2.jpg)
Table 2 |