Perhaps someday, there will be automated delivery to the doorstep, which for now is dependent on humans.

“Like any moonshot, you have to think of time as a factor,” Mr. Rubin said. “We need enough runway and a 10-year vision.”

Mr. Rubin, the 50-year-old Google executive in charge of the new effort, began his engineering career in robotics and has long had a well-known passion for building intelligent machines. Before joining Apple Computer, where he initially worked as a manufacturing engineer in the 1990s, he worked for the German manufacturing company Carl Zeiss as a robotics engineer.

“I have a history of making my hobbies into a career,” Mr. Rubin said in a telephone interview. “This is the world’s greatest job. Being an engineer and a tinkerer, you start thinking about what you would want to build for yourself.”

He used the example of a windshield wiper that has enough “intelligence” to operate when it rains, without human intervention, as a model for the kind of systems he is trying to create. That is consistent with a vision put forward by the Google co-founder Larry Page, who has argued that technology should be deployed wherever possible to free humans from drudgery and repetitive tasks.

The veteran of a number of previous Silicon Valley start-up efforts and twice a chief executive, Mr. Rubin said he had pondered the possibility of a commercial effort in robotics for more than a decade. He has only recently come to think that a range of technologies have matured to the point where new kinds of automated systems can be commercialized.

Earlier this year, Mr. Rubin stepped down as head of the company’s Android smartphone division. Since then he has convinced Google’s founders, Sergey Brin and Mr. Page, that the time is now right for such a venture, and they have opened Google’s checkbook to back him. He declined to say how much the company would spend.