rs review each other's code. Potentially implemented in a hierarchical manner where senior engineers provide sign-off on junior contributions before they can be accepted into the main development branch. Code analysis tools (such as Coverity) which is an automated form of the peer review and can provide additional metrics to evaluate code complexity such as Knots and Cyclomatic Complexity that help pinpoint to potential areas to target code simplification or additional test focus to ensure correct behavior. This can be done as part of an automated build environment with regular (nightly) regression tests. Functional Unit testing is software verification and validation method in which a development engineer verifies whether a certain piece of source code in isolation is working as per the desired behavior or not in the development phase. Its more applicable to development team and should mandatorily be done by developer on the modified code before code freeze. Unit testing is typically done by building a harness around a developed component/code snippet. The test harness exposes the target code to defined test vectors and behavior is compared to expected behavior. Unit testing tests not only the code but also the compiler/linker and the target hardware (or simulated hardware). Unit testing is an inherent part of any code development. In networking products in general, and wireless specifically, unit testing tools include pcap file analysis to provide automated interpretation of Ethernet traffic, specifically, DU/RU testing uses, defined through (MATLAB-generated) known orthogonal frequency division multiplexing (OFDM) frames that can be compared against the digital version of the trans- mitted signal in a regression test environment. Tool Command Language (TCL) scripting is often used to automate testing. Note that unit and functional tests often can be automated and made part of an automated regression test suite that runs overnight or on code check-in, ensuring a product functionality is not broken as features a