"Test Cycle Time" includes the total time taken for one cycle of testing, from test planning to closure. During test estimation, considering the Test Cycle Time is crucial as it ensures that time is allocated not just for executing tests but also for reviewing and retesting, if necessary.

The traceability matrix is prepared during the Requirement Analysis phase of STLC. It's a document that maps and traces user requirements with test cases. It ensures that all requirements are covered by test cases so that no functionality is left untested.

"Exploratory Testing" is an unscripted testing approach where the tester actively controls the design of the tests as those tests are performed. The tester often follows their intuition and experience during testing.

Unit testing primarily focuses on testing individual units or components of a software in isolation. The main aim is to validate that each unit of the software performs as designed. It ensures that every part of the software behaves correctly in isolation.

Risk Monitoring and Review is the continuous process of tracking identified risks, monitoring residual risks, and identifying new risks. Given the introduction of new regulations, it's essential to continually review and adapt to these unforeseen changes in the project's context.

A 'test suite' in the context of automated testing primarily consists of a sequence or collection of test scripts that are intended to be executed as a batch. This allows for organized execution of related tests, ensuring thorough coverage and validation of specific application functionality.

A Test Lead usually handles the specifics of a testing project, guiding the team and making decisions at the project level, whereas a Test Manager typically has a broader responsibility, involving decisions at a departmental or organizational level, managing resources, budgeting, and setting long-term strategies.

Exploratory Testing is an approach where testers actively explore the application and, based on their findings, design and execute tests. It's particularly useful in scenarios with limited documentation, as it allows testers to quickly identify and focus on potential problem areas.

A holistic quality assurance approach is achieved when combining both manual and automated testing. While automation provides speed, repeatability, and accuracy, manual testing offers flexibility, human intuition, and an ability to address usability concerns.

Structural testing, often referred to as white-box testing, focuses on the internal structure or workings of an application. It requires a thorough understanding of the software's architecture and seeks to test the software's internal structures directly.