重量和平衡报告需要提供质量特性的控制和管理，并确保质量特性变化最小。DID DI-SESS-81112B包含合同中所述工作任务产生的可交付数据的格式、内容和预期用途信息。

Weight and Balance Reports are required to provide for control and management of mass characteristics and to ensure minimal mass properties variations.DID DI-SESS-81112B contains the format, content, and intended use information for the data deliverable resulting from the work task described in the contract.