Boundary value analysis:
Ex : consider the numbers from 1 - 1000 which should provide 
valid results when entering a value in between them.

We will break the numerics from - infinity to + infinity in 
to three cases as explained in step 1,2 and 3

step 1: 1 to 1000 (When entering a value startign from 1 to 
ending with 1000, should provide valid results as defined) - 
Pass
step 2: - infinite to 0 (When entering a value startign from 
- infinite to ending with 0, should provide Invalid results) 
- Fail
step 1: 1001 to + Infinie (When entering a value startign 
from 1001 to ending with + Infinite, should provide Invalid 
results) - Fail



Equivalence Class Partitioning:
Consider an eXample, like a text box on the form need to 
accept only "Special Characters"
so here comes the following:
Valid Case:"Only special characters" - when entering these 
characters should not display any validation message
Invalid Case: " A-Z, a-z, 0-9" - when entering these 
characters should display validation messages