Final answer:
Gathering multiple perspectives from people involved in each issue is best for the performance and longevity of an ECO.
Step-by-step explanation:
For the performance and longevity of an ECO, the best approach would be to gather multiple perspectives from people involved in each issue. This allows for a comprehensive understanding of the problem and can lead to more effective solutions. By considering various viewpoints, one can identify potential challenges and find ways to address them. It also promotes inclusivity and collaboration, which are important for sustainable and long-lasting solutions.