What is Boundary Value Analysis Testing?

Boundary value analysis is a type of black box or specification based testing technique in which tests are performed using the boundary values.

Example:
An exam has a pass boundary at 50 percent, merit at 75 percent and distinction at 85 percent. The Valid Boundary values for this scenario will be as follows:

• 49, 50 - for pass
• 74, 75 - for merit
• 84, 85 - for distinction

Boundary values are validated against both the valid boundaries and invalid boundaries.
The Invalid Boundary Cases for the above example can be given as follows:

• 0 - for lower limit boundary value
• 101 - for upper limit boundary value

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