Beware common drawbacks of split testing

Beware common drawbacks of split testing


Businesses must be aware of the typical drawbacks associated with split testing if they are to improve the success rate of their email marketing campaigns.

Split testing can provide businesses with valuable information that can improve email marketing campaigns, but only if it is carried out correctly.

A split test is a simple way of determining what kind of email will produce the best results from a firm’s audience. It involves dividing an email audience into two separate groups (A and B) and sending two different versions of an email to the two randomised groups.

Below are three common mistakes associated with split testing that businesses should understand before creating their own split test.

Making sure your list is random
One of the most common mistakes of split testing is dividing a contact list in half and using those two halves as the A group and B group. The problem with this is that one half of the list will be made up of older subscribers, and will perform in a mediocre way compared to the newer segment of the list.

A better option is putting every second name in a contact list into one group. Once a business’ contact list is split in two, businesses should then check each half of the list. If one half has a majority of something, like Hotmail addresses, then a business may experience email deliverability issues with that half of the list. This will then impact on the results of the email test.

Only test ONE variable at a time
Testing more than one variable at a time prevents users from determining the impact each element has on a campaign’s performance. The only way to determine if a specific variable is the reason behind a change in email results is to test that one variable by itself.

Don’t over-analyse
If the split test was set up correctly, then the end results are the results. The value of a true random split test is that the results are generally quite conclusive.

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If you believe the matters discussed above are relevant to your business, please contact Darren Smith of our office to discuss further.


Darren is a Chartered Accountant with extensive experience, including working in the big 4 and medium sized firms before becoming a partner of a city based firm in 2000.

He has gained much experience and has extensive knowledge in providing business and taxation advice, superannuation planning, negotiation of sales and acquisitions of businesses and property development. His client base covers a wide range of industry groups.

Darren works with business owners to grow their businesses and create personal wealth within and outside of their business.


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