What is Exploratory Testing and when is it used?

Exploratory Testing is a hands-on approach where testers actively explore the application without predefined test cases, simultaneously learning, designing, and executing tests based on their findings.

Key Characteristics

• Unscripted: No formal test cases written beforehand
• Simultaneous: Learning, test design, and execution happen together
• Creative: Relies on tester’s intuition and experience
• Adaptive: Tests evolve based on discoveries
• Time-boxed: Usually performed in sessions (60-120 minutes)

When to Use

• Limited time for testing
• Incomplete or unclear requirements
• New features or applications
• Complement to scripted testing
• Finding edge cases and unusual scenarios
• After major code changes

Techniques

1. Session-Based Testing: Time-boxed testing sessions with charters
2. Scenario-Based Testing: Test realistic user scenarios
3. Strategy-Based Testing: Use specific strategies (boundary, error guessing)

Advantages

• Finds defects missed by scripted testing
• Requires less preparation time
• Adapts to changes quickly
• Leverages tester creativity

Disadvantages

• Difficult to reproduce defects
• Depends heavily on tester skill
• Hard to measure coverage
• Not suitable for compliance testing