# Best and worst UI for subway ticket system

## Case 1: Singapore

- Click your destination directly from the subway map (Outram Park)
- Insert coins until price is zero
- Take the ticket

## Case 2: San Francisco

- Select payment method (Credit card)
- Find your stop from subway map
- Find your stop from a list (Montgomery)
- Look for one way price and remember it ($1,75)
- Calculate how many full integers can be subtracted from 20
- Click Subtract $1 for
**18 times** - Calculate how many 0.05 decimals can be subtracted from 2
- Click Subtract 5 cent for
**5 times** - Click Print $1.75 ticket
- Click to confirm
- Take the ticket

## Comparison

Case 1 required 1 click when case 2 required 26 clicks plus some math, searching from a list and keeping numbers in mind. Is it that hard to simulate most typical use cases before implementing them?

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