The Agile model is well-suited for projects where rapid changes are expected, as it emphasizes adaptability and customer feedback. Iterative development allows the team to accommodate changes in requirements and design more flexibly than traditional models like Waterfall or V-Model.

Configuration Management (CM) in software development primarily serves to systematically manage, organize, and control the changes and versions in software documents, code, and other entities during the development process. It ensures consistency and traceability across the software lifecycle.

Having domain knowledge allows testers to better anticipate potential problem areas within the software. By understanding the nuances and intricacies of the domain, testers can "guess" or predict where errors might occur, making their testing efforts more focused and effective in uncovering defects.

Performance Testing encompasses a range of tests (including Load, Stress, Scalability, and Volume Testing) to ensure that the software behaves well under expected loads, extreme conditions, and varying workloads. The objective is to deliver a seamless user experience, irrespective of the conditions or demands placed on the software.

"Defect Removal Efficiency" (DRE) metric measures the effectiveness of the testing process. It's calculated as the ratio of defects found before release (by the testing team) to the total defects (found both before and after release). A higher DRE indicates a more effective testing process.

The "Post-release Defect Density" metric gives insights into the number of defects found in the software after its release. A high density suggests that the testing process might have missed issues, while a low density implies effective testing during the development phase.

A "walkthrough" in the review process aims at achieving a mutual understanding of the product. It's a type of informal review where the author leads team members through the product, explaining his or her approach, and it primarily serves to share understanding and gather feedback.

Incremental integration testing involves combining modules one by one and testing them. It is performed in a step-by-step manner, starting with two modules and then gradually increasing the number. This ensures that interface-related errors are detected and fixed.

Stress Testing is designed to push a system beyond its normal limits to see how it responds. It helps in identifying the upper boundaries of a software system and checks its robustness. This is crucial in ensuring that the system will not crash or have unacceptable slowdowns when faced with extreme conditions.

In the Test Planning phase of the Software Testing Life Cycle (STLC), all the planning for the testing activities is done. This includes selecting and setting up the necessary testing tools.