SSA do bespoke synthesis, and bespoke work raises a question this circle has not really answered: what do you lean on when there is no published series at all?
For a catalogue line you can read years of independent results. For a one-off there is nothing behind it by definition. What SSA do is send the batch record as part of the package rather than on request, and state the minimum quantity in the quote rather than after acceptance.
My own answer is that where there is no series, your own commissioned analysis is worth proportionally more. I would say that about any supplier.
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