Integration testing is conducted before system testing to ensure that different modules work together as a coherent system. It focuses on verifying the interactions and data flow between modules, which is crucial before evaluating the system as a whole.

Control flow testing is the technique used to validate that loops and conditional statements in the code are working as expected. It examines the paths through the code to ensure that all logical conditions are adequately tested.

Stress testing primarily evaluates the performance aspect of a software system. It aims to determine how the system handles heavy workloads and high stress conditions, including response times and resource utilization.

The principle suggesting that derived classes must be substitutable for their base classes is "Polymorphism." It allows objects of derived classes to be used where objects of the base class are expected, enabling flexibility and extensibility in software design.

Normalization is used in database design to improve data integrity by reducing redundancy. Redundant data can lead to anomalies and inconsistencies in the database. Normalization involves breaking down the data into smaller, related tables to minimize redundancy.

In regression testing, version control systems can be utilized to track the system's stability and functionality over successive iterations. These systems help manage code changes, provide historical data, and enable the comparison of different versions to identify potential regression issues.

Corrective maintenance strategies in this scenario involve addressing errors as they occur. This approach ensures that issues are promptly fixed to minimize user disruption and maintain the software's reliability. Delaying error corrections or ignoring them can lead to decreased user satisfaction and could exacerbate problems in the long run.

White box testing is also known as "Structural" testing because it focuses on the internal structures of the software. It examines the code and internal logic to identify issues and defects.

Usability is the quality attribute that refers to how easy it is for users to use the software. It encompasses factors like user-friendliness, accessibility, and the overall user experience. A software application with good usability is intuitive and efficient for its users.

The Customer Problems Metric can be used to enhance user satisfaction and product quality in subsequent software releases by identifying areas where customers are experiencing issues or dissatisfaction. By addressing these specific problems and improving the software based on customer feedback, the development team can create a more user-friendly and higher-quality product, ultimately leading to greater user satisfaction.