Hi Ismael

Not really - they are both the same techniques but according to the American's TIA is for work in progress and SIA is for completed projects.

Best regards

Mike Testro

Hi Ismail

These are American titles.

In the definitions section of types of analysis prepared for the Virginia Department of Transport:

http://www.virginiadot.org/business/resources/const/0703_PrinciplesofSIA.pdf

The terms are defined as follows:

Modification Impact Analysis (U.S. Army Corps of Engineers) – a contemporaneous

schedule impact analysis technique in which at the time of modification, the

actual status of the job is determined, the schedule is updated, and the delay is

inserted to quantify singular impact

Time Impact Analysis – similar to the Modification Impact Analysis, a schedule impact

analysis technique that recreates the actual status of the job at the time of

modification, updates the schedule, inserts delays, and quantifies singular impact;

although retrospective in that it is done after the fact, it has a contemporaneous

orientation, not a hindsight perspective

Schedule Impact – the potential effect of a delay or change on a project schedule; may

be in the form of delay or change in project completion date, delay or change in

project sequence, or consumption of float

Schedule Impact Analysis (SIA) – the process of quantifying and apportioning the

effect of delay or change on the project schedule.