Also in October, Amazon.com Inc. said it was ending field tests of Scout, its home-delivery robot, after learning that some aspects of its “unique delivery experience” weren’t “meeting customers’ needs,” a company spokeswoman said.Chili’s Grill & Bar, the casual-dining chain owned by Brinker International Inc., in August halted the rollout of Rita, which seated guests, served food, bused tables and sang “Happy Birthday.” The decision came just four months after Chili’s had expanded Rita from 10 trial locations to 51 more restaurants.“We’re going to stop some of those projects that we just didn’t have a line of sight to a return on the business,” Brinker Chief Executive Kevin Hochman said during an earnings call at the time.“I have not seen good examples of companies successfully deploying robotic systems in low-margin, public-facing settings.” “We hope we will have the opportunity to continue the progress we were jointly making in the near future,” Mr. Higueros said.McDonald’s Chief Executive Chris Kempczinksi in July told investors and analysts he thought robots weren’t a practical solution to labor demand in the vast majority of restaurants."