SIT-System integration testing
The individual modules are integrated into single software
system then they will test the inter module functionalities.

   Byeeee friends
Rajendra
rajendra_penumalli@yahoo.com
9885162742

DIT- is nothing but a development integration testing This
the Testing team they will check the application using some
type of testing. suppose they miss some error next they will
go to
SIT- SIT is nothing but a System integration testing This
the Testing team they will check the application using some
type of testing. suppose they miss some error next they will
go to UAT team.

sit means system integration testing 
after system testing if client specifies in agreement that 
application should go throughn SIT. then we will perform 
system integration testing.....so it is optional (if not 
client specifies in agreement)........
actually system integration testing is testing the how the 
internal application works with external software

SIT-System integration testing

When the individual modules are integrated into software
system then they will test the software system as a whole is
consider as a SIT.

For Example :

If there is a software system let say "A", and we are in the
process of including three different module "a","b","c" in
the span of 20 days each, then in this case
             at first phase----SIT is --"A"
After 20 days
             SIT is ----"A"+"a"
         (Testing is concluded on this SIT as overall)

After 40 days
             SIT is-------"A"+"a"+"b"
           (Testing is concluded on this SIT as overall)
  
After 60 days
             SIT is----------"A"+"a"+"b"+"c"
            (Testing is concluded on this SIT as overall)

Aman Kumar
aman.testing@gmail.com