Reuse-based software development is an approach to development that tries to maximize the reuse of existing software. The software units that can be reused may be of radically different sizes such as application system reuse, component reuse, object and function reuse etc. I often come across programmers/developers that try to reinvent the wheel when faced with complex software requirements rather than exploring avenues for reuse. A reuse-based approach to software development is not without its drawbacks but the complexity of modern software systems means that software reuse is the best approach that can be used to alleviate this inevitable complexity.