Non Functional Requirements for an SMS customer relation service Essay

Non Functional Requirements for an SMS customer relation service - Essay Example Availability also ensures that the system has a relevant location of operation that meets the relevant connection requirements. Besides, the availability component denotes the percentage of time in which the system is up and must be running correctly (Bochmann, 2009). Performance is another imperative non-functional key that every user should be acquainted with, in any system. The performance constraint must specify all the timing characteristics incorporated in the software. Some features and task are more time sensitive compared to others. Therefore, the non-functional requirement must be able to identify the software functions that contain any constraints on their performance. Performance also entails the response times which takes into account the loading time as well as the time the screen takes to open and the refresh durations. Other facets of performance include processing time, which entails imports, calculations, and exports. Lastly, the query together with the reporting times that take into consideration the initial and subsequent loads forms another important aspect of performance (Griffiths, 2009). Another essential facet to note is usability. It incorporates the ease of use necessity. It addresses the features that establish the capacity of any software to be easily learned, understood and used by the intended users (Stellman, 2010). Additionally, the usability component takes into account the look and feel standards that integrate screen element, density, keyboard shortcuts, flow and layout, UI metaphors and colors. Similarly, internationalization or localization requirements form an important feature of usability. Usability also takes into account paper sizes, keyboards, languages and spellings. The last non-functional key is security. It is very important to ensure that only trusted users can gain access to a system. The login requirements must maintain