BVA & ECP

Boundary value Analysis (BVA): BVA is different from equivalence partitioning in that it focuses on “corner cases” or values that are usually out of range as defined by the specification. This means that if function expects all values in range of negative 100 to positive 1000, test inputs would include negative 101 and positive 1001. BVA attempts to derive that value often used as a technique for stress load or volume testing. This type of validation is usually performed after positive functional validation has completed successfully using requirements specifications and user documentation.

Equivalence Partitioning: An approach where classes of inputs categorized for product or function validation. This usually does not include combinations of input, but rather a single state value based by class. For example, with a given function there may be several classes of input that may be used for positive testing. If function expects an integer and receives an integer as input, this would be considered as positive test assertion. On the other hand, if a character or any other input class other than integer is provided, this would be considered a negative test assertion or condition.

Example: