The Accord?
The perfume accord is the 'backbone' of the fragrance and consists of the main building blocks of the scent or olfactive creation.
The perfumer is evaluating the creation with a view to capturing the character of the scent, its top, middle and base note. Perfumers will also start to assess the scent over time, e.g. its dry-down, and how the accord evolves.
Equally, perfumers will try and relate the fragrance to other scents on the market to identify whether this particular perfume is an 'evolution', 'revolution' and/or whether it has an unusual 'twists'.