In black-box testing for a shipping system, which weights should be considered for boundary value analysis?

The concept of boundary value analysis is fundamental in black-box testing, where the main focus is on input and output rather than internal code structure. In this context, boundary value analysis targets the values at the boundaries of input ranges, as these are often where defects occur.

Considering all weight ranges allows testers to evaluate the system's behavior not only at the edges of valid input ranges but also to ensure that the system appropriately handles inputs that fall just outside of these ranges. For instance, if the valid weight range is defined as 1-100 lbs, evaluating weights both just below and just above the specified limits (like 0 lbs and 101 lbs) is essential to confirm that the system responds correctly to invalid inputs.

By testing all weight ranges, including those that are valid and invalid, the testing process becomes comprehensive. This helps ensure that any edge cases or unexpected behaviors are identified and addressed, which might not be explored if only valid or specific ranges are considered. Thus, the approach to consider all weight ranges aligns with best practices in boundary value analysis, making the system robust and reliable.