Michel Jussiau
Cost per use and cost per effect produced
The vost per use and the cost per effect produced are two key indicators in fashion and luxury, and represent the core of this service. You need to know them before you buy a product.
The cost per use
The cost per use is a profitability indicator. In the gemstone sector, it indicates, taking price into account, whether the model is associated with satisfactory durability or not. More generally, here's the formula:
Cost per use : Price/durability. The lower the ratio, the better, as this is synonymous with inexpensive jewelry that doesn't scratch easily.
For your information, this ratio differs slightly from the one used in fashion, which is calculated as follows:
Cost per use: Price/number of times the item is worn.
The cost per effect produced
The cost per effect produced is an indicator that didn't exist before and that I personally invented. Unlike the cost per use, which measures a stone's durability, the cost per effect produced measures its look. More generally, it is calculated as follows: Price/effect on the crowd. The lower the ratio, the better, since this is synonymous with an inexpensive piece of jewelry that makes a great impression. This is the most important indicator to take into account when buying a stone. To see ratings (cost per use and cost per effect produced) for over 300 different models, click here.