Which statement is correct regarding the use of exploratory testing for safety critical systems? SELECT ONE OPTION

In the context of safety-critical systems, strict regulatory standards (such as DO-178C, IEC 61508, and ISO 26262) mandate rigorous traceability, documented test cases, and formal coverage metrics for high-risk components. Exploratory testing is an experience-based, informal technique that lacks the strict documentation, reproducibility, and formal coverage guarantees required for these high-risk levels. According to ISTQB guidelines for risk-based testing in safety-critical domains, exploratory testing is highly recommended only for low-risk levels where the overhead of formal test design is not justified. High-risk areas strictly mandate formal, specification-based, and structure-based testing techniques.

A: Automation capability does not dictate the use of exploratory testing; the component's risk level and regulatory compliance requirements do. B: High-risk levels in safety-critical systems require formal, documented testing for traceability, making informal exploratory testing unsuitable as a primary method. C: Exploratory testing is still highly valuable and recommended for low-risk components within safety-critical systems, so it is not entirely unrecommended.

1. ISTQB Advanced Level Technical Test Analyst (CTAL-TTA) Syllabus v4.0 (2021), Section 4.2 (Structure-Based Testing) and Risk-Based Testing principles.

2. ISO/IEC/IEEE 29119-4:2015 Software and systems engineering — Software testing — Part 4: Test techniques (Guidelines on technique selection based on risk).

3. International Electrotechnical Commission (IEC). (2010). IEC 61508: Functional Safety of Electrical/Electronic/Programmable Electronic Safety-related Systems.