Ford's decline among respondents was driven in large part by the auto maker's shifting electrification strategy. Ford has scaled back its EV targets, abandoned a goal of achieving 8 percent margins on EVs by 2026 and postponed the launches of some electric models to focus on smaller, more affordable products.
Ford detailed many of those changes in February and March while the survey was being conducted, all amid a broader slowdown in North American EV sales growth.
"This year reflects that turmoil in the marketplace and also reinforced organizational issues within Ford," Andrea said.
When asked about Ford's scorecard on supplier relations last week, Liz Door, the auto maker's chief supply chain officer, told Automotive News that a new program called "Engage" will focus on communication with a wider pool of suppliers.
"Our interactions are so critical to our success model," she said. "It's really focused on ensuring we have mutual goals, that we're listening to our suppliers … and that we're working in collaboration to deliver the best quality, cost competitiveness and delivery on time."
Andrea said all auto makers need to be better aligned internally to make sure their purchasing departments have good relations with suppliers and also to ensure that significant business decisions are made with the ramifications for suppliers in mind.
"The purchasing organization itself can be spot-on and doing everything it possibly can to better communicate and be more accessible and to effectively and efficiently make decisions," he said.
"But if your business decisions and corporate practices are putting more costs into doing business with the customer, that can overwhelm even high-quality buyer characteristics."
Andrea said Nissan has benefited from more open communications with suppliers and better internal alignment on EV targets. He said Nissan did a better job of involving suppliers in that process than it has in the past and has also incentivized its executives to think more about supplier relations.
When making a decision, companies should ask "how that impacts suppliers and what they can do to minimize risk and minimize costs," Andrea said. "And by doing that, you're naturally going to improve your supplier relations scores."
Michael Martinez contributed to this report.