Why was the U.S. government primarily interested in Whitney's methodology for producing muskets?

Answer

Ease of maintenance in the field

The government's practical interest was ensuring that if a musket broke, a replacement part could be swapped in quickly without waiting for a specialized gunsmith for custom repairs.

Why was the U.S. government primarily interested in Whitney's methodology for producing muskets?
inventionProductionManufacturingideaWhitney