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How Amazon's Houston fulfillment center uses AI technology and robotics to move millions of products

From robotics to artificial intelligence, here's how Amazon gets its products to Houstonians in record time. Photo by Natalie Harms/InnovationMap

Last summer, Amazon opened the doors to its North Houston distribution center — one of the company's 50 centers worldwide that uses automation and robotics to fulfill online orders.

The Pinto Business Park facility has millions of products in inventory across four floors. Products that are 25 pounds or less (nothing heavier is stocked at this location) pass through 20 miles of conveyor belts, 1,500 employees, and hundreds of robots.

The center also has daily tours open to the public. We recently visited to see for ourselves the process a product goes through at this Houston plant. From stowing to shipping, here's how packages go from your shopping cart to your front porch.

Starting with stowing 

Natalie Harms/InnovationMap

A product's first step in an Amazon facility is stowing. There's no categorization of the products — it's not like there's one floor for one type of item or anything.

"It's completely randomly stowed," says Donna Beadle, PR specialist for Amazon. "She could be stowing cat food on this floor, and so could somebody on floor two."

An Amazon employee would scan an item and stow it into an empty bin of her choosing — sort of. To prevent confusion, a light projected indicates bins that are off limits to stow the item. The light identifies bins that have similar products. Keeping similar products apart helps prevents mistakes for the employee who later pulls those items once its ordered.

The system also sees where the employee is putting each item, rather than having to scan each item and the bin as well. This is a newer feature — the facility originally opened with hand-held scanners.

"Our next generation workstation is that they don't have to hold that scanner — they have hands free," says Brenda Alford, regional communications manager at Amazon.

Robots on the move

Once the bins are fully stocked, the robot — which is the orange device on the bottom of the yellow bins — moves about the facility by scanning QR codes on the floor.

Should a product fall out, an employee wearing a special vest can enter to retrieve it. That vest will send off a signal to the robots, which will then decrease their speeds and come to a stop when the employee comes close.

"It's an extra measure of safety so that people can interact with the robots and feel safe," says Beadle.

Picking before packing

Natalie Harms/InnovationMap

Once an item is ordered, the bin with that item appears in the pick process at the center. The system tells the Amazon employee which item to grab and which bin to put it in. The bins will have products for multiple different orders — another employee later will separate it out later.

"Often we describe it as a symphony — our technology and our associates working together," Alford says, noting that sometimes the company might receive criticism about using robots over humans. "We can't do this without these humans.

Amazon employees receive their benefits from day one on the job, Beadle says, and they work four, 10-hour days a week.

"We feel like that way they have more time with their families — they get three days off versus two days off. And that gives them time to heal and rest up," she says.

Bin to bin and back again

Natalie Harms/InnovationMap

Once full, the Amazon associate will push the bin onto a series of conveyor belts. The whole facility has 20 miles of conveyor belts — much of which happens overhead.

The bins then zigzag toward the pack process, which is separated to different stations. There are single-product stations and multiple package stations. The system determines where the bin should go, and some stations pack products that are determined to need packing materials, while others do not.

Single-product packaging

Natalie Harms/InnovationMap

At the packing process, the Amazon employee is told which size box to assemble — he or she can grab a bigger box, but they can't select a smaller one. The tape dispenser doles out the correct size of tape for that box automatically.

Once packaged up, a sticker with a barcode is placed on the box. This code will later be used to print the label for shipping. At this point in the process, no personal information has been revealed to anyone. In fact, most packages leave the facility without any personal information being viewed by employees.

In an effort to reduce packing materials, some products are shipped in the container they came in. In that instance, the packer would just place the barcode sticker on the package before sending it on the conveyor belt.

"If we don't need another box for that product, we don't use one," Beadle says. "We work with companies to make that happen, so we don't have to use more boxes if we don't have to."

SLAM 


While the robotics aren't slamming labels on packages, the SLAM process (short for scan, label, apply and manifest) is the first step in the process that includes a customer's personal information. During this process, the barcode is scanned, the package is weighed, and the label is printed and affixed to the package using a puff of air.

A package might be automatically pulled from the line if something seems to be off in the package's weight.

"Say you bought toothpaste, and it says that toothpaste weighs 20 pounds, we know something's wrong," Beadle says. "Like maybe that it was a pack that didn't get separated."

If the package is kicked off, an Amazon associate, called a problem solver, will assess the situation and make it right before returning it to the conveyor belt.

Kicked into gear

Once labeled, all the packages are sent on their final conveyor belt ride. Using a scanning process, the packages are kicked by an automated foot that sends them into a line to be loaded into an Amazon truck.

If a package misses its chute the first time around, it makes the loop again. The system can tell if a package is caught in the loop for whatever reason, and a problem solver might be called to assess the situation.

Down the slide

Natalie Harms/InnovationMap

After being kicked off the belt, the package then slides down a spiral chute that, despite looking like a playground slide, is off limits to any humans wanting to keep their job.

"People ask if you can go down the slide, and we always say that on your last day of work," Beadle jokes.

On to the shipping process

Natalie Harms/InnovationMap

The packages leave the facility in Amazon trucks and head to one more pit stop before making it to the customer.

"They don't go directly to your house after this process," Beadle says. "They go to a sortation center."

This could mean a USPS or UPS stop, but it depends on where the customer lives.

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Building Houston

 
 

This week's roundup of Houston innovators includes Isabella Schmitt of Proxima Clinical Research, Rob Schapiro of Microsoft, and Lara Cottingham of Greentown Labs. Photos courtesy

Editor's note: In this week's roundup of Houston innovators to know, I'm introducing you to three local innovators across industries — from medical device innovation to energy tech— recently making headlines in Houston innovation.

Isabella Schmitt, director of regulatory affairs at Proxima Clinical Research and principal at M1 MedTech

A Houston life science expert shares what she thinks Houston needs to work on to continue growing as an health care innovation ecosystem. Photo courtesy

Houston is home to the world's largest medical center, but it still tends to fall behind other metros when it comes to life science innovation hub rankings. Isabella Schmitt, director of regulatory affairs at Proxima Clinical Research and principal at M1 MedTech, writes in a guest column for InnovationMap about why this is — and what can be done to change that.

"Houston's life sciences sector holds immense growth potential, but addressing funding, talent recruitment, regulatory navigation, and collaboration challenges is needed for continued success," she writes. "By tackling these issues and leveraging its unique strengths, Houston can establish itself as a significant player in the global life sciences arenas. If we wait too long, we won’t be able to truly establish the Third Coast because another player will come into the mix, and we’ll lose companies like BioMatrix to their golden shores." Read more.

Rob Schapiro, Energy Acceleration Program director and Houston site leader for Microsoft

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At a glance, Rob Schapiro admits his resume might not make the most sense. A trained geologist with decades of experience in the energy sector, Schapiro made the move to Microsoft three years ago.

"I saw this disconnect between technology companies and energy companies — they didn't really speak the same language," he says on this week's episode of the Houston Innovators Podcast. "I thought I could help potentially solve this problem and work between the two as a sort of translator."

Now, as Microsoft’s Energy Acceleration Program director and site leader for the company’s Houston office, which is located in the Ion, Schapiro is deeply embedded in Houston's innovation ecosystem and is dedicated to helping advance Houston's role energy transition in a sustainable and equitable way. Read more.

Lara Cottingham, vice president of strategy, policy, and climate impact at Greentown Labs

Greentown Houston is asking its current and potential members what they want in a wet lab. Photo via GreentownLabs.com

Greentown Labs is in the early stages of building out a wet lab for its members. But first, Lara Cottingham, vice president of strategy, policy, and climate impact at Greentown Labs, says they want to know what their members actually want.

"We want to announce to the community that this is something we're going to build — but we still need a lot of feedback and input from startups so we can learn what exactly they need or want to see from the wet lab," Cottingham tells InnovationMap. "No two wet labs are the same."

Right now, there aren't any details available about timeline or specifics of the new facility. Greentown is prioritizing getting feedback from its members and having conversations with potential sponsors and corporate partners. Read more.

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