Summary of Evaluation Techniques

After carrying out our task analysis, cognitive walk through and heuristic evaluation we identified several weakness in our proto-type. These weak points will now be listed:

From the Task Analysis:
- If the user forgets their PIN number
- If the user can't find the desired product on search
- If the user does not follow the on screen navigation instructions
- What happens if the user is refused credit
- Conflict between the cashier and the user between prices


From the Cognitive Walk-through:
- Language Support
- Annoying recommendations keep repeating itself
- An on screen guide showing how to enter the card
- Intelligent search
- Display photos of the items
- Display where in the shopping process she is - what's next to be found on the shopping list
- Show an animation when an item is being detected in the trolley
- Allows the user to set the fat, sugar and salt content intake
- Shows all the offers that are applicable to the user


From the Heuristics Evaluation
- The system does not tell the user what part of the shopping process they are at, for instance does not tell the user that they are logging in
- The measurements are in metric, but the old people understand imperial
- Change font size control
- Change 'Begin Route' to 'Start Shopping' a phrase they are more familiar with
- Too much Red is used
- Help screens need to available in necessary places