After a pilot program that kicked off last fall in several Pennsylvania stores, Giant Food Stores announced on Monday that it will place Martys in each of the supermarket chain's 172 stores.

The robotic rollout is part of a plan by Giant's parent company, Ahold Delhaize USA, to deploy around 500 robots to stores like Giant, Martin's and Stop & Shop. The robots will begin arriving "in waves" over the coming months, according to Giant, which expects to have the devices fully deployed in about six months.

"Bringing robotics and A.I. from a research lab to the sales floor has been a very exciting journey, and we were thrilled by the customer response in our pilot stores," Nicholas Bertram, president of Giant Food, said in a news release. "Our associates have worked hard to bring this innovation to life with amazing partners."

The in-store robots move around the store unassisted, scanning the floors for spills and trip hazards, which are reported to human workers, the company said.

Loading

Once a spill is located, the machine -- which makes beeping noises as it moves -- reports spills by verbally communicating them to human employees after paging them.

In addition to scanning grocery store shelves for items that are out of stock, Marty also does price checks, looking for discrepancies between the shelf and the store's scanning system, Patrick Maturo, the manager of store optimisation at Ahold USA, told the Pennsylvania news website PennLive.

The news outlet reported that Marty is equipped with scanners to avoid in-store collisions, is powered by rechargeable lithium batteries and has multiple cameras on board.

Giant claims the robots' efforts free up associates to spend more time serving with customers and help stores mitigate risk caused by spilled foods. Because it is doing assistant work, Maturo said, Marty isn't replacing human jobs. He said the customer response has been largely positive.

"Many times people are ambivalent to them and just walk right by," Maturo said. "Then there's a large majority of people that are very excited to see a robot in the store.

"They tend to take pictures of it, video of it and selfies with the robot," he added. "It's very cool."

Giant isn't the only retailer turning to robots to police its many aisles. In December, Walmart announced plans to place 360 autonomous robots inside stores nationwide by the end of January.

Their job: scrubbing the store's expansive aisles and collecting data in the process.

Those robot custodians are powered by Brain Corp, a San Diego-based technology company that has partnered with Walmart. The retailer already has a fleet of more than 100 of the devices operating inside its stores.

Automation will allow workers to perform new tasks in some industries, but it won't stop millions of people from needing to switch occupations or upgrade their skills in the coming years, according to a McKinsey Global Institute report released last year.

The report estimates that as many as 800 million people may lose their jobs to robots by 2030. Some of those jobs sound a lot like cleaning floors at Walmart.

"Activities most susceptible to automation include physical ones in predictable environments, such as operating machinery and preparing fast food," the report states. "Collecting and processing data are two other categories of activities that increasingly can be done better and faster with machines."

Washington Post