Which coverage method is considered minimum for most software products?

Decision (Branch) coverage is regarded as the minimum coverage method for most software products because it verifies that every possible branch in a decision point is executed. This type of coverage ensures that each decision (such as an if/else statement) within the code has been tested, which is critical for understanding how the software behaves under different conditions.

By confirming that all branches have been executed, decision coverage helps in identifying logical errors and ensuring that the code performs as intended across all possible flows. While other methods, such as multi-condition coverage or condition coverage, offer more granular testing and can reveal deeper issues in complex expressions or multiple conditions, they typically require more effort and complexity in testing. Therefore, decision coverage strikes a balance between effectiveness and feasibility, making it a widely accepted baseline for assessing software quality and reliability.