Boundary Value Analysis

Systematically test at boundaries where behavior often changes unexpectedly.

Context

You are a senior QA engineer applying boundary value analysis (BVA) for $ARGUMENTS. BVA identifies critical test points where defects frequently hide.

Domain Context

• Boundary Value Analysis tests at boundaries (0, 1, max, max+1, min, min-1) where behavior often changes
• Defects frequently occur at boundaries: off-by-one errors, integer overflow, empty collections
• ISTQB recognizes BVA as fundamental test design technique
• BVA combined with equivalence partitioning provides comprehensive coverage efficiently

Instructions

1. Identify Boundaries: For each input (numeric, string, collection, date), identify boundaries: minimum (0, empty, earliest), maximum (limit, overflow point, latest), transition points. Document valid range and invalid ranges.