Robustness is the ability of a computer system to cope with errors during execution and deal with erroneous input. Robustness can encompass many areas of computer science, such as robust programming, robust machine learning, and Robust Security Network. An app succeeds as a result of the right decisions made at the right time. The most successful mobile app developers understand the importance of performance, quality, and robustness across the array of mobile devices that their customers use.

A robust product can be one that doesn’t break easily. Thus, an operating system in which any individual application can fail without disturbing the operating system or other applications can be said to be robust. Robust is also sometimes used to mean a product or system of products designed with a full complement of capabilities. Thus, in the context of the business world, early UNIX systems were not considered as robust as IBM’s mainframe operating systems, such as MVS, which were designed for continuous operation with a very low failure rate and features such as automatic backup of file systems.