"Photoshop" is a graphic design and photo editing software and is not typically used in the risk identification process in software testing. On the other hand, Brainstorming, Risk Matrices, and Flowcharting are common techniques and tools used to identify and visually represent risks.

In the Top-down approach of incremental integration testing, testing starts from the top or main module and moves downwards, incorporating sub-modules one by one. This approach allows testing of the main functionality earlier in the development process, even if all sub-modules aren't complete yet.

The Error Rate in usability testing refers to the number of errors users make when interacting with a product or system. A high error rate may indicate that the user interface is not intuitive or is confusing, necessitating design changes to enhance usability.

The principle that "Exhaustive Testing is Impossible" acknowledges that it's impractical to test every possible scenario due to constraints like time. In cases where time is limited, prioritizing test cases becomes crucial, focusing on high-risk or high-importance areas of the application.

The principle of "Keyboard Accessibility" ensures that all features and functionalities on a website or application can be accessed and executed using only the keyboard. This is essential for users who cannot use a mouse or other pointing devices effectively.

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.

Error Guessing is a testing technique where testers rely on their past experiences and knowledge of system failures to identify potential defects. Instead of using a systematic approach, testers use their intuition to "guess" where defects might be present and construct tests based on these hunches, drawing from previous issues they have encountered.

Load testing focuses on understanding the behavior of the system under a specific load or request volume. Metrics like latency (response time) and throughput (number of requests processed per unit time) are crucial.