The Price Sensitivity Measurement (PSM) was developed by the Dutch economist Van Westendorp in 1976 and is most suitable for the determination of the price bracket of new products and services. Whilst the PSM can be used in early phases of product development in particular, to reveal price thresholds and to check whether there are enough potential buyers in the targeted price segment, it is somewhat less suitable for precise price recommendations.

The aim of the PSM is to use four questions to determine the acceptable price bracket and eventually to identify an optimum price. The four questions are as follows, with no adaptation for any specific product:

• At what price would you begin to think the product is too expensive to consider?
• At what price would you begin to think the product is so inexpensive that you would question the quality and not consider it?
• At what price would you begin to think the product is getting expensive, but you still might consider it?
• At what price would you think the product is a bargain – a great buy for the money?

On the basis of the resulting intersecting points, four price points can be determined:

• Optimum price: This is where the consumer’s resistance to purchasing is at its lowest.
• Indifferent price: The smaller the difference between this price and the optimum price, the greater the customer’s price sensitivity.
• Lower price limit: If the price were set below this threshold, it could harm the company’s image.
• Price upper limit: If the price is above this limit, the number of people who see the product as too expensive exceeds the number of those who do not think it is expensive.