Voice Command Testing primarily focuses on ensuring that an application or website can be navigated and operated using voice commands. As voice-activated devices and technologies are becoming more prevalent, it's essential for web content and applications to be compatible with such methods to aid users with specific disabilities.

The "Defect Removal Efficiency" metric quantifies the effectiveness of the testing process in identifying and rectifying defects. A higher percentage indicates that the testing process was successful in catching and resolving a large proportion of defects during testing.

When a defect is first identified and logged, it is in the "Open" state. This means that the defect is now recognized and needs investigation or action. It has yet to undergo the various phases of the defect life cycle where its validity and resolution will be determined.

During Test Planning, the Test Plan is the key document that captures all aspects of testing, including the identification and assignment of roles and responsibilities, resources, schedules, and other relevant details to guide the testing efforts throughout the cycle.

Enforcing a strong password policy would be the primary recommendation, as it directly addresses the core issue of weak passwords. This policy would mandate criteria like password length, complexity, and change frequency. While MFA and regular audits are beneficial, addressing the root cause is essential.

White-box testing is focused on the internal structures of an application. While Cyclomatic Complexity, Statement Coverage, and Path Testing are white-box techniques, Usability Testing is a type of black-box testing, focusing on user experience.

In the STLC, a Risk Management Plan provides a structured approach to identify, assess, and prioritize risks associated with the testing process. It offers a framework for making decisions and allocating resources based on potential impacts and likelihood of risks.

Auditing in Configuration Management ensures that the current design and build state of the software matches the latest product baseline. It involves a systematic examination of the processes, making certain that all procedures and standards are being followed, ensuring the integrity of the product.

Continuous Delivery focuses on ensuring that code changes can be deployed to production at any time, making the release process reliable. Continuous Deployment, on the other hand, ensures these changes are automatically deployed to production frequently without human intervention.

While Load Time, Response Time, and Throughput are common metrics used in performance testing to measure various aspects of the system's performance, "Number of Defects" is not a performance metric. It is typically associated with functional testing and bug tracking.