Overview of system:
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The system provides constant feedback to the user an example of when this feedback is provided is when the food is scanned it shows the name of the food and a picture of it and also it provides feedback in a "beep" in response to a complete scan. Having looked at the system maybe a list of all the screens they have gone through to get to the current one could be displayed as this would help the user know where abouts they are.
Language in the system tries to avoid any technical words and keeps the language relatively simple.
To keep the system consistent the colours and format of the different screen are consistent. The system also keep a main menu back and a next button on the bottom of the screen for all screens other than the main menu itself.
The ability to recognise what to do next is clear in most cases as constant feedback allow for the user to know what to do, but this really has to be put to the test in a user evaluation.
Our system is based on the principle of being able to correct mistakes made as we all make them. There is an undo button on the hardware and also a back button on the screen.
The system is relatively simple there are advanced functions that can be access as the system allows doctors, nutrition experts to view what a specific person has been eating. There are many many different forms which the user could possibly access so again it would be good if a user opinion could be obtained.
The system error recover built in occurs mainly in situations where a scan of the product hasn't been recognised. It prompts the user to scan the item again.
The documentation is mainly in the form of user prompts which allow the user to follow there process in the system and also alert them about what to do next.
The expert use needs to be improved or ignored as it maybe helpful to more technological minded elderly but, i would also say that the system is quite simple and relatively
