Launch hours is the amount of labor required to launch a stage of the spacecraft. The amount of labor required to launch a spacecraft stage ranges from three hours for a seven kilogram model to one hundred and sixty thousand hours for a Saturn V class stage. This includes the work of the technicians as well as a minimum of support personnel in a well run corporation. This does not include the wasted labor in a poorly run organization, that is considered to be part of the labor rate for that organization. In other words, say you have an inefficient bureaucracy where only one in four of the hours worked is actually useful, the launch hours are considered to be the same, it is the labor rate that is four times higher.

Given initial hours, launch multiplier and reusability, launch hours is calculated which is in turn used to calculate launch labor costs.

launch hours = initial hours * ( launch multiplier + 1.0 / reusability )

launch labor = launch hours * labor rate * location labor multiplier
 

This is used in spacecraft cost.
 

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