Version 15.1 User’s Manual

Understanding The Impact Of Changes (cont)
Before vs. After Comparison Types of Analysis
Whether one is doing a Before vs. After over all system analysis or simply doing a Before vs.
After job analysis, there are two ways to set up the comparison parameters. The choices are:
1. Multiple Period Comparison
2. Day vs. Day Comparison
Let’s first look at how we set up a multiple period analysis.
Q: What is a multiple period analysis?
A: At any graph level (Month, Week, or Date), one has the ability to measure any combination
of months, weeks or days simply by splitting any trend line on a historical
graph
Let see an example below where we create the before vs. after periods:
Version 15 User Manual Page 191 Oct 2011