Exploratory testing is a type of testing that emphasizes the personal freedom and responsibility of

the individual tester to continually optimize the quality of his/her work by treating test-related

learning, test design, test execution, and test result interpretation as mutually supportive activities

that run in parallel throughout the project. While exploratory testing can be highly effective in

certain contexts, for safety-critical systems, it is generally not recommended. Safety-critical systems

require a high degree of assurance and predictability that each component of the system behaves as

expected under all circumstances. Manual black-box tests, which are more structured and can be

thoroughly planned and documented, are preferred in these scenarios to ensure comprehensive

coverage and traceability.

Reference = The ISTQB Advanced Level Agile Technical Tester syllabus and training materials provide

guidance on the appropriate use of different testing techniques in various contexts, including the

recommendation of structured manual black-box testing over exploratory testing for safety-critical

systems1234.