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Equation 37 · Part 3 · The Real Economics of Shipping a Model to a Device

Symbol U

Qdevice∗=(Cdev+U)/(ccloud−cd)Q^{*}_{\mathrm{device}} = (C_{\mathrm{dev}} + U) / (c_{\mathrm{cloud}} - c_{d})
UU

What this part means

U is one of the signed contributions combined to compute the quantity on the left.

Its job in the formula

U is one of the signed contributions combined to compute the quantity on the left.

The passage around this formula

…additional tier a release has to validate and every device already in the field that has to receive the update whether or not it ever calls the feature. Ask which term in Qdevice∗Q^{*}_{\mathrm{device}} = (CdevC_{\mathrm{dev}} + U) / (ccloudc_{\mathrm{cloud}} - cdc_{d}) a given vendor’s public statement is actually about, and whose incentive is served by leaving the other three out of the sentence.

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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.

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