What property of requirements is particularly essential for testers?

The property of requirements that is particularly essential for testers is testable requirements. Testable requirements are those that can be verified through testing processes, allowing testers to design specific test cases and determine whether the software meets the specified needs.

When requirements are testable, they provide clear and measurable criteria that can be assessed during the testing phase. This clarity enables testers to ascertain if the functionality developed aligns with what was initially requested, facilitates the identification of defects, and supports the validation of the overall system.

In the context of testing, practicable requirements may seem relevant; however, without being testable, a requirement might be implemented but never actually verified against the original criteria. Testability is crucial because it directly impacts the ability to verify and validate a system effectively.