Equation 10 · Part 1 · The Real Economics of Shipping a Model to a Device
Symbol U
What this part means
the cost of distributing model updates to the installed fleet, expanded in the next section.
Its job in the formula
U is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol U→Article meaning
Where the article explains it
Define U as the cost of distributing model updates to the installed fleet, expanded in the next section.
The passage around this formula
Define as the fixed, per-release engineering and QA cost of producing and validating the device-tier variant matrix described above — the harness time, the pass/fail sign-off per tier, per quantization scheme, per chip target. Define U as the cost of distributing model updates to the installed fleet, expanded in the next section. Define as the marginal cost of one additional on-device inference and as the marginal cost of one additional cloud-served inference of the same model. Total cost over Q queries under each placement is
Learn the underlying idea
A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.
Open the illustrated variables: a letter stands for a value guide →
See this notation across published equations →
Sources cited in the article section
These citations provide research context; check each source for the exact claim it supports.