This part of ISO 9241 provides ergonomics guidance on individualization within interactive systems, including recommendations on — where individualization might be appropriate or inappropriate, and — how to apply individualization. It focuses on individualization of the software user interface to support the needs of users as individuals or as members of a defined group. It does not recommend specific implementations of individualization mechanisms. It provides guidance on how the various aspects of individualization are made usable and accessible, but does not specify which individualizations are to be included within a system. NOTE Individualizations depend on the specific context of use for which an interactive system is to be designed and/or used, and need to be developed for that specific context of use. This part of ISO 9241 is not intended to be used in isolation. It deals only with individualization within the context of designing a complete software system. It is intended to be used with ISO 9241-110 and any other parts in the ISO 9241 series applicable to the design of the intended system. Some of its guidance can also be applied to hardware user interfaces and user interfaces that combine software and hardware.