1. Is it a physical vending machine?
2. The blind people we target are totally blind, but can hear and speak?
Assuming the answer is YES.
Identify User Groups
Blind people, but also technicals and operators, and for business purpose, we also need to support normal people.
I will focus on blind people since it’s our goal.
Report User Needs
1. When blind people pass by, they need to know where is the vending machine and how to get there
2. When they are in front of the vending machine, they need to know the items on sale, name, price and stock
3. They ‘choose’ a specific item and pay for it
4. Then pick up the item they bought
5. They can leave the feedback
Cut Through Prioritization
I guess 1, 2, 3 user needs are essential, while 4 could be the same as normal ones, since not that much hard to get it, and 5 might be considered in the future.
1. App for the blind people, it will notify them when there is a vending machine nearby, and ask whether they would like to have some snack or drink via voice and vibration
2. The vending machine can detect there is a blind customer there via App, or there is a big physical button for blind people to wake up the vending machine
3. Automatically introduce the items by voice, including name, price and stock, blind people can respond to it
4. Blind people can directly say what they want via voice input, vending machine give them voice feedback
5. Pay by the credit card or app without inputting password (normally no password required under $200)
6. App can be voice controlled in advance with a specific item or the user preference
Evaluate the Trade-offs
1. Impact 5, Cost 4
2. Impact 5, Cost 2
3. Impact 4, Cost 3
4. Impact 5, Cost 3
5. Impact 5, Cost 2
6. Impact 3, Cost 3
I will choose 1, 2, 4, 5 solutions to provide a vending machine with voice and app support for the blind people buy some snack and drinks.