Scenario: A loan calculator (for amounts under $50,000 / £25,000)
Two sliders (with associated input fields) one for total amount,
second for duration.
Moving the sliders affects a results panel which shows amount
repayable per month & total cost of loan.
Three sliders, as option A but this time also including a 'monthly
amount' slider. Moving 'amount' and 'duration' moves the 'monthly
amount' automatically. User can also move the 'monthly amount' slider
to affect the total amount slider.
I don't agree with option B, I think it is over complicating the
calculation. When you are considering a mortgage you consider what you
can afford per month and calculate backwards to work out what this
will let you spend, I'm not sure the same is true of smaller loans as
in this case where you generally have an amount and purchase in mind.
In option A you are able to see the cost to you per month in real-time
so can make a decision about whether you can afford it.
what do you guys & girls think?
John Gibbard (User Experience Architect)
t. +44 (0)7957 102577 skype. johngibbard