Can you explain the concept of the edge value analysis method and its application?

Boundary Value Analysis (BVA) is a testing technique that focuses on checking values at the boundaries of acceptable ranges. The idea is that errors most often occur at the boundaries, for example, when transitioning from one range to another.

Application:

• Determine the minimum and maximum input values.
• Test values directly at the boundaries, as well as slightly below and above these boundaries.

Example: if a field accepts values from 1 to 100, test values will be 0, 1, 2, 99, 100, 101.

This helps identify errors related to incorrect handling of boundary conditions, which are often missed in regular testing.