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what is the difference between BVA&ECP?
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Answer Posted / rudraneel
BVA :
Boundary Value Analysis :
1.It is a Black Box Technique
2.Here input values for boundaries of input domain are
tested.
3.Here valid and invalid both values are considered.
Example :
For a login page SRS is
UserId should be within 15-50 characters
so valid boundaries are 15-50
invalid boundaries are <15 or >50 i.e; 14 or 51
If A(Valid)=15/50 thenA1(Invalid)=14/51
For Invalid Boundaries always considered like this way (A-
1) or (A+1)
Adv:
>Very good at exposing potential input problems
>very clear guide-lines on determining test cases
>Very small set of inputs are generated
Disadv:
>Doesn't cover all set of inputs.
>doesn't combine all possible combination
ECP
Equivalence Class Partitioning :
1.As the name suggests that the data is divided into such a
way that same class will give same type of input.Like
Class1 is a combination of Valid inputs and Class2 is a
combination of Invalid inputs.
Disadv :
>Heuristic based method.
>Limited focus.
>No guide lines for choosing input.
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