Topic: Test Method and Test Technique

As per my experience Test Techniques are

1) Boundary Value Analysis

    In this method tester has to concentrate more on the boundaries of the input values.

   Ex: Consider any edit field which can accept values b/w 18-35.

         According to BVA method the valid inputs are:

         17,18,19,34,35 & 36 .

         If the range is 'a' to 'b'.

        Then valid i/ps are:  a-1,a,a+1,b-1,b,&b+1.

2) Equivalence pertitioning

    In this method given i/p is divided into number of equivalence classes.

    From each equivalence class one i/p value is chosed for testing.

    Ex.Consider the above ex. edit field which accepts i/p value b/w 18-35.

    From the given range of i/p value we can form  3 equivalence classes.

    i) Less than 18. 

   ii) Between 18-35.

  iii) Greater than 35.

    Take any value from three equivalence classes and test them.

    Ex.   6, 25,100

3) Error guessing.

    This depends on the tester experience, domain knowledge, & common sense.

    Ex:For the same above ex.

        i)23+,-34,5*,00,Blank,5o(Not zero,O),etc.