Question no1:

Consider following case study and identify functional and nonfunctional requirements.

• SatWatch is a wristwatch that displays the time based on its current location. SatWatch uses GPS satellites (Global Positioning System) to determine its location and internal data structures to convert this location into a time zone. The information stored in SatWatch and its accuracy measuring time is such that the watch owner never needs to reset the time. SatWatch adjusts the time and date displayed as the watch owner crosses time zones and political boundaries. For this reason, SatWatch has no buttons or controls available to the user. As the SatWatch has no buttons, no software faults requiring the resetting of the watch should occur. SatWatch determines its location using GPS satellites and as such, suffers from the same limitations as all other GPS devices (e.g., inability to determine location at certain times of the day in mountainous regions). During blackout periods, SatWatch assumes that it does not cross a time zone or a political boundary. SatWatch corrects its time zone as soon as a blackout period ends. SatWatch should display the correct time zone within 5 minutes of the end of a GPS blackout period.