A positioning that sounds good in the meeting room but does not elicit real reactions from customers is an unachieved positioning. The way to test this is much cheaper than learning that lesson after spending all the money.
Before committing budget to a positioning, test it with customers for real reactions in three cheap and quick ways: in-depth interviews to understand motivations, a test landing page to measure actions, and small ads to gauge attention. What you need to look for are signs that customers understand how you differ and whether that meets their needs. When interviews stop yielding new information, and when customers start asking to buy rather than just nodding, that is the time for a larger commitment.
A brand positioning developed in a meeting room and then directly launched to the market with the entire budget is an unnecessary gamble. Not because the idea is bad, but because people within the company cannot objectively assess their own positioning. A more cost-effective approach is to test first, test with real customers, and clearly understand what you are measuring.
This is a point many people overlook. When asking family, colleagues, or friends about positioning, the responses are almost always positive because they do not want to discourage you. When asking potential customers with leading questions like "Do you find this point appealing?", you will also only receive polite nods.
A genuine response takes on a different shape: customers immediately understand how you differ without needing further explanation. Customers associate it with a problem they are actually facing. They ask follow-up questions, inquire about pricing, or suggest a follow-up meeting. That is a signal that positioning has hit the mark, not just a comment like "sounds good."
An impressive interview is not evidence. Two people praising is not a trend. What you need is enough interviews to start hearing the same things again, which is the information saturation point. A point mentioned by three or more people is worth considering as a signal.
The research by Guest, Bunce, and Johnson (2006) on qualitative interviews often cites around 12 interviews. However, the authors emphasize that this number varies based on the homogeneity of the customer group. About 10 to 15 in-depth interviews for each target customer group is a practical starting point. The real principle is to stop when you cease to hear new information, not when you reach a certain number.
When recording or taking notes, you should ask for customer consent beforehand and keep the recordings without names or phone numbers. The information customers leave on the test landing page is also personal data, so you need to clearly state the purpose and ask for consent right at the contact information field, using it only for that purpose and not retaining it longer than necessary for the test (Personal Data Protection Law No. 91/2025/QH15).
Topic: How to test positioning with real customers before committing budget. Sinh Vũ guide, sinhvu.com
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Clayton Christensen, Know Your Customers' Jobs to be Done, Harvard Business Review. Guest, Bunce, and Johnson, How Many Interviews Are Enough?, 2006. Practical experience from Sinh Vũ. Personal Data Protection Law No. 91/2025/QH15. This information is for reference only and does not constitute legal advice.
There is no widely agreed hard number. The research by Guest, Bunce, and Johnson (2006) often cites around 12 interviews for each customer group, but they emphasize that this number varies by context. A more practical principle is to stop when you cease to hear new information, which is the saturation point. For brand positioning, about the first ten interviews is a reasonable starting point, and it can increase to around 10 to 15 in-depth interviews for each target customer group. However, you must assess based on the homogeneity of your customer file.
Yes. In-depth interviews do not cost advertising money, only time. You can present a handwritten pitch or a simple description page for current customers to read and ask for their genuine reactions. A short presentation to a potential customer group and then observing who asks follow-up questions and who remains silent is also data. The important thing is to measure action, however small, rather than just collecting comments.
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