Hi frnd
    BVA(Boundary Value Analysis):means Boundary Value 
Analysis .to validate the data minimunm value to maximum 
data.
    ECP:(Equelence Class Partition):ECP means Equelence 
Class Partition.this data to validate Valid invalid data
For ex:     valid data         Invalid data
         A to z 
         1 to 1000             special characters
login with valid useraname
valid user name should containe alphabets and numbers
Invalid username should contain special characters
***we will done retesting first.
retesting means to test diffrent combinations of data

Regression testing:
-------------------
regression testing means test enginers test the build and 
if any defects is found in the application test engineer 
report the defects to the development team.development team 
resolve the defect and send to modified build to the 
testing team.then testing team conduct regression test that 
defect is modified oor not.This is the regression testing.

hai this is sunithayagnamurthy.If any mistakes is thr 
please Excuse.
all the best

hi this is sunithayagnamurthy,
ECP: Euelence Class patition:it test valid & invalid 
BVA means Boundary Value analysis it test the maximum value 
to minimum value

regression testing:sfter releasing the build the testertest 
the build and report to the developerand after developer 
modify the build and after relesing the modified the build 
again themodified the build is modified or not thats is 
called the regression testing
retesting:it test the different combinations of data that 
is called the retesting

****** we will done retesting first

Hey Sunithayagnamurthy,
The Logic above  for Retesting and Regression testing is 
Nearly correct.I shall be glad, if i get some more in 
detail for Retesting..Do u have a seperate test cases for 
Retesting Sunitha?..Plz let me kw u'r view on that.

Sunitha, i wannna ask u , u Gave 2 answers for BVA and ECP 
rite?...so Just let me knw , for BVA (IS it testing Min to 
Max or Max to Min).

Here is my email id cynosure001@rediffmail.com
Thank u!

ECP(Equalence Class Partitioning) : ECP used for to 
validate valid / Invalid data. ECp For PhoneNo is as 
followes,
 Valid data               Invalid Data
  0-10 numerics             Alphabates
  - SpecialCharacter        Remaining specialcharacters

BVA (Boundary Value Analysis)  :BVA of the PhoneNo is,
   
InputConditions                   OutPut

  16-1                            Pass                 
   16                             Pass
  16+1                            Fail
  8-1                             Fail
   8                              Pass
  8+1                             Pass

*** First we should do Retesting. why because
  Retesting means , testing the application with different 
kind of data.
  Regresion means , If any bug i.e (found by tester and 
fixed by developper)resolved by development team, we will 
do regression test for to check that bug is resolved or not 
on modifeid build.regression testing is nothing but testing 
on modified build.

friend any mistakes are there excuse me.
tannq.