Nissa Scott is now a robot babysitter. Credit:Bryan Anselm/ The New York Times Perhaps no company embodies the anxieties and hopes around automation better than Amazon. Many people, including President Donald Trump, blame the company for destroying traditional retail jobs by enticing people to shop online. At the same time, the company's eye-popping growth has turned it into a hiring machine, with an unquenchable need for entry-level warehouse workers to satisfy customer orders. 'Maybe we wouldn't be getting two-day shipping' Amazon's global workforce is three times larger than Microsoft's and 18 times larger than Facebook's, and last week, Amazon said it would open a second headquarters in North America with up to 50,000 new jobs. Complicating the equation even more, Amazon is also on the forefront of automation, finding new ways of getting robots to do the work once handled by employees. In 2014, the company began rolling out robots to its warehouses using machines originally developed by Kiva Systems, a company Amazon bought for $US775 million ($963 million) two years earlier and renamed Amazon Robotics. Amazon now has more than 100,000 robots in action around the world, and it has plans to add many more to the mix.

The robots make warehouse work less tedious and physically taxing, while also enabling the kinds of efficiency gains that let a customer order dental floss after breakfast and receive it before dinner. Amazon now has more than 100,000 robots in action around the world, and it has plans to add many more to the mix. Credit:Bryan Anselm "It's certainly true that Amazon would not be able to operate at the costs they have and the costs they provide customers without this automation," said Martin Ford, a futurist and author of "Rise of the Robots," a book about automation. "Maybe we wouldn't be getting two-day shipping." The dynamics between people and machines play out on a daily basis on the floor of Amazon warehouses in places like Florence, New Jersey, and Kent, Washington. In Kent, the robots vaguely resemble giant beetles and scurry around with vertical shelves loaded with merchandise weighing up to 3,000 pounds on their backs. Hundreds of them move autonomously inside a large caged area, tailgating each other but not colliding. Robots and humans working in unison

On one edge of the cage, a group of human workers - the "stowers" - stuff products onto the shelves, replenishing their inventory. The robots whisk those shelves away and when a customer order arrives for products stored on their backs, they queue up at stations on another edge of the cage like cars waiting to go through a toll both. There, human "pickers" follow instructions on computer screens, grabbing items off the shelves and putting them in plastic bins, which then disappear on conveyor belts destined for "packers," people who put the products in cardboard boxes bound for customers. Dave Clark, the top executive in charge of operations at Amazon, said the company wanted the machines to perform the most monotonous tasks, leaving people to do jobs that engage them mentally. "It's a new item each time," Clark said. "You're finding something, you're inspecting things, you're engaging your mind in a way that I think is important." The robots also cut down on the walking required of workers, making Amazon pickers more efficient and less tired. The robots also allow Amazon to pack shelves together like cars in rush-hour traffic, because they no longer need aisle space for humans. The greater density of shelf space means more inventory under one roof, which means better selection for customers.

The Amazon warehouse in Florence shows the latest example of the kinds of jobs machines can do better than people. Eight mechanical arms are in operation at the facility, a warehouse where large quantities of merchandise are broken down into smaller units and distributed to Amazon fulfillment centers across the country. The arms go by the awkward name of robotic palletisers, but workers have given them a dash of personality, sticking signs on each one naming them after Stuart, Dave and other minion characters from the "Despicable Me" movies. Unlike the warehouse robots in Kent, which were based on the machines Amazon got through its Kiva acquisition, these arms come from an outside company. Amazon began installing them late last year, not long after it opened the warehouse in Florence. The robot arm is configured to pick up only bins of a standard size, not objects of other dimensions. In a demonstration of future possibilities, Amazon showed a virtual reality simulation used to prototype new robot concepts, including an arm with a forklift attachment that moved pallets. Just a matter of time When Amazon installed the robots, some people who had stacked bins before, like Scott, took courses at the company to become robot operators. Many others moved to receiving stations, where they manually sort big boxes of merchandise into bins. No people were laid off when the robots were installed, and Amazon found new roles for the displaced workers, Clark said.

"The people didn't go anywhere," he said. The question going forward is: What happens when the future generations of robots arrive? For now, there are warehouse tasks - for example, picking individual items off shelves, with all their various shapes and sizes - where people outperform robots. Amazon has added 80,000 warehouse employees in the United States since adding the Kiva robots, for a total of more than 125,000 warehouse employees. And it says the warehouse hiring spree will continue. But startups and researchers are scrambling to overcome the many remaining technical obstacles. Amazon even sponsors an annual contest to encourage more innovation in the category. Ford, the author, believes it is just a matter of time before the employment picture in Amazon's warehouses changes.

"My assumption is this technology will eventually displace a lot of people in those warehouses," Ford said. "I would not say that overnight huge numbers of jobs disappear. Maybe the first indication is they don't get rid of those people but the pace of job creation slows down." 'It's a myth' Amazon's Clark said history showed that automation increases productivity and, in some cases, demand from consumers, which ultimately creates more jobs. He said warehouse workers would continue to work in technologically rich environments. "It's a myth that automation destroys net job growth," he said. In the case of the Florence facility, it opened up the new opportunity for Scott.

At one point, one of the arms knocked over a tote, sending a dozen or so cone-shaped plastic coffee filters skidding across the ground. Scott hit a button that froze the arm so she could safely pick up the mess. Then the arms started working again. Loading "The robot will work the same all day long," said Edward Cohoon, who supervises Scott and other Amazon workers as they tend to individual robots. "Their stomachs don't grumble." The New York Times