It’s not all about looks in the world of e-commerce, usability is just as important for converting site visits into sales.

There are some exceptions – notably Ling’s Cars – but in general websites need to be easy to navigate with a simple checkout process to prevent users from abandoning a potential purchase.

In January we reported on Four Seasons’ $18m website redesign, which achieved low usability scores despite the massive cost of development.

Getting it right is by no means a straightforward process, and as such website testing is absolutely vital.

Our Conversion Rate Optimisation Report and Multivariate Testing Buyer’s Guide can help with what may seem a daunting task.

But companies also need to be aware of the total cost of the testing process with numerous models available, as compiled by Monetate below.