How many tests are needed to achieve 100% two-value boundary value analysis for a shipping scale system?

To achieve 100% two-value boundary value analysis for a shipping scale system, it is essential to understand the concept of boundary value analysis itself. This technique focuses on testing values at the extremes of input ranges. In boundary value analysis, when considering two values (typical for testing maximum and minimum scenarios), we assess both the boundary points and the values just below and above those boundaries.

For a system like a shipping scale, you typically have a minimum and maximum weight that can be measured. Assuming that the shipping scale has a defined range (let's say from a minimum weight of 0 kg to a maximum weight of 100 kg), we will identify boundary points and the values around them.

1. At the minimum boundary, you would test:

   • Below the minimum (e.g., -1 kg)
   • At the minimum (0 kg)
   • Above the minimum (e.g., 1 kg)

2. At the maximum boundary, you would also test:

   • Below the maximum (e.g., 99 kg)
   • At the maximum (100 kg)
   • Above the maximum (e.g., 101 kg)

These scenarios would lead to testing 6 critical boundary conditions: -1 kg, 0