Maintainability refers to how easily a system, product, or piece of software can be updated, repaired, or modified. High maintainability means that changes can be made quickly and with minimal effort, which is essential for keeping systems efficient and relevant over time. This is particularly important in fields like software development and engineering, where technology evolves rapidly. Factors that contribute to maintainability include clear documentation, modular design, and adherence to coding standards. These elements help developers and technicians understand the system better, making it easier to troubleshoot issues or implement improvements. Ultimately, good maintainability leads to reduced downtime and lower long-term costs.