Hi Myles, consumption in Watson Studio is measured with CUH (Capacity Unit Hours), the first time you create the service you start with 50 CUH, and depending on what you work they are discounted. Every beginning of the month your CUH returns to 50.
Aditionally, you can see your consumption of CUH within a project in Watson Studio in environments.
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Virginia del Pilar Monroy Malca
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