How an overhaul of Amazon's US logistics network in recent months cut delivery times, changed inventory management, and altered search results on its website (Sebastian Herrera/Wall Street Journal)

Sebastian Herrera / Wall Street Journal:
How an overhaul of Amazon's US logistics network in recent months cut delivery times, changed inventory management, and altered search results on its website  —  Company seeks to trim package travel time, though some sellers still cite delays  —  Amazon.com has upended its vast logistics network …