设计变更是指设计部门对原施工图纸和设计文件中所表达的设计标准状态的改变和修改。根据以上定义,设计变更仅包含由于涉及工作本身的漏项、错误或其他原因而修改、补充元设计的技术资料。设计变更和现场签证两只的性质是截然不同的,凡属设计变更的范畴,必须按设计变更处理,而 Design change refers to the design department on the original construction drawings and design documents expressed in the design standard state changes and changes. According to the above definition, design changes only include technical information that is modified and supplemented by meta-design due to omissions, errors or other reasons involving the work itself. Design changes and on-site visa two nature is completely different, any design changes in the category, you must change according to the design, and