The "last mile" of package delivery is the most expensive and labor-intensive. Companies are racing to implement delivery robots that can address this challenge.

A delivery robot carries a payload from a source to its destination. In some cases, the robot will travel along hallways and elevators and stay within a building. In other cases, the bot will go outside and carry its packages to customers at their homes or workplaces.

Consumers' desires for faster delivery are one factor behind a significant increase in delivery robots. Another element impelling adoption is eCommerce, which has caused the number of packages delivered to skyrocket. And yet a third influence is the effect of COVID. There was a labor shortage already in the making before the pandemic. Then COVID made matters much worse - reducing the available workforce in a variety of ways. Not only because of sickness and death but also indirect factors like staying home to take care of children. And the fear of contagion contributed to an increasing demand for contactless delivery services.

The market for autonomous delivery robots is still in its infancy. Yet, the demand for delivery robots is indeed zooming upward. The worldwide market for delivery robots was estimated to be US $24.30 million in 2019. According to Verified Market Research, annual sales are projected to reach US $236.59 million by 2027, growing at a cumulative annual rate of 34.3%. Companies that offer delivery robots are rushing to supply the surging demand.

Below we list some of the industries using delivery robots and their various uses.

Industries Using Delivery Robots

Within buildings:

Restaurants

• Take orders from customers at the table
• Deliver food to the table
• Carry dirty dishes back to the kitchen (with a person loading the plates and glasses onto the robot)

Hospitality – Hotels and Convention Centers

• Show lodgers to their room
• Bring items to customer's rooms (towels, toiletries)
• Deliver food service to the room
• Carry luggage to and from the rooms

Hospitals

• Deliver test samples from a patient's room to the lab
• Carry soiled linens from a patient's room to the laundry
• Transport waste to the disposal area
• Deliver food to patients' rooms
• Bring mail and packages to patients' rooms.

Outside of buildings:

• Logistics providers

Each of the companies that deliver packages has an active delivery robot program, including DHL, FedEx, and UPS, among others.

• eCommerce

Not only giants like Amazon and Walmart but also local grocery stores, pharmacies want to use delivery robots.

• Restaurants

Fast food delivery is a huge market for delivery robots.

• Humanitarian organizations.  

Delivery of medicine and food to remote areas.

Request offers on any type of delivery robot from suppliers.

Land-based Delivery Robots

Most land-based delivery robots resemble a box with wheels. There are three kinds:  the first type travels only within a building. The second are those that travel along sidewalks and crosswalks, but not along public roads. And the third type are over-the-road self-driving vehicles.

Having a robot deliver food to your table is still a novelty, but it may soon become commonplace. Robots that provide extra towels or room service to hotel guests save labor and have been well received. Hospital robots can perform numerous delivery services and thereby free up personnel to concentrate on more high-value activities. Robots that only operate inside buildings tend to be taller and more slender so that they can more deftly wend their way along hallways or between tables. 

Delivery robots that travel along sidewalks are usually about the size of a cooler and travel at a walking speed. Over a dozen states in the US have legally classified such robots as "pedestrians."  Since they are lighter and move more slowly, they represent a lower risk of damage in case of a mishap. Being considered a pedestrian puts the bar lower for regulatory approval. Sidewalk bots are especially gaining acceptance on college campuses. For example, the delivery robot company Starship is reported to have service on nearly 20 different campuses in 15 states in the United States. Vendors include Starbucks, Panda Express, Panera Bread, and Subway, among others.

Robots that travel over surface roads are heavier and faster. They can potentially do more damage if there were to be a malfunction. So, they must meet a higher standard of safety. In some cases, people drive such vehicles via remote control. The first regulatory allowance for a genuinely autonomous delivery robot traveling public roads was granted by the US Department of Transportation in February of 2020, according to an article about Nuro.  There are still only a limited number of locations where autonomous on-road delivery robots can legally operate.

Ground-based delivery robots typically have a keypad mounted on the outside of the robot. When the bot arrives at its destination, a text message alerts the customer. A numeric code is included in the text. The customer meets the robot and types the code into the keypad, thus opening a latch. And the goods can then be retrieved from the robot.

Advantages to land-based delivery robots include:

• Faster delivery. With a fleet of robots, there's no waiting for the next delivery person to be available
• Personnel can focus on higher-value activities. Nurses can focus on tending to patients. Restaurant staff can pay more attention to customers in the restaurant.
• The robot lessens dependence on labor for low-value tasks in the context of a labor shortage.
• More predictable delivery because robots don't need breaks or downtime.
• Increase productivity - get more done with the people you have.
• Less costly than having people do the transportation.
• The customer can retrieve their goods without contact with another person. Contactless delivery is vital in a pandemic environment.

Limitations

There are still concerns about the technology, primarily regarding safety. Driving a car is a highly complex task involving many variables. Unexpected conditions can and do arise. So, the safety of over-the-road self-driving delivery robots is still a major consideration. The question of safety has limited the regulatory approval of delivery robots that drive over public roads.

For sidewalk robots, regulatory approval has been somewhat easier to obtain. This is because the robots are smaller, and they travel at a walking speed. Yet, there are concerns. For example, what about the pedestrians who don’t pay attention to their surroundings? How can the mobile robot handle this? There is also the question of vandalism or theft. Some of these nagging questions remain.