Which is included among the required disclosures for segments of an enterprise?

Major customers are included among the required disclosures for segments of an enterprise under the guidance of accounting standards, specifically ASC 280 (Segment Reporting). This standard requires entities to disclose information about their customers when a single customer accounts for a significant portion of the entity's revenue, defined typically as more than 10%. This helps financial statement users to understand the risks related to reliance on a limited number of customers, which could affect the stability of revenues and overall business operations.

In contrast, other options do not align with the segment reporting disclosure requirements. Investors in private placements do not pertain to segment reporting but rather relate to investment-specific disclosures. Internal audit procedures are more about company governance and do not provide relevant information about segment performance. Financial projections, while important for various financial reporting contexts, are not mandated disclosures within the segment reporting framework, focusing instead on historical performance and current market conditions.