Based on the stakeholder matrix, suppliers are categorized as having high impact but low influence. This suggests that while they are significantly affected by the project, they do not have much control over it. Therefore, the best approach is to keep them well-informed and show interest in their needs to maintain a positive relationship and ensure their requirements are met.

References: The answer aligns with the best practices in stakeholder engagement as per the Capability in Business Analysis™ (CCBA®) guidelines, which recommend tailoring communication strategies to the stakeholders’ level of impact and influence to effectively manage their expectations and contributions to the project. The CCBA® resources available on the IIBA website provide further insights into effective stakeholder engagement strategies.