清晰界定变更类型后，更需通过标准化的全流程管理将各类变更纳入规范轨道。国际 EPC 项目的变更管理绝非单一环节的孤立操作，而是涵盖 “提议 - 评估 - 审批 - 执行 - 结算” 的闭环体系，涉及文件规范、价款调整、工期适配、索赔处理等多重关键节点。只有严格遵循既定程序、明确各环节操作要求，才能平衡各方利益、降低变更风险，确保项目有序推进。以下将详细拆解变更全流程的管理要点与实操规范。
After clearly defining the types of variations, it is even more crucial to bring all types of variations into a standardized track through standardized full-process management. Variation management in international EPC projects is by no means an isolated operation of a single link, but a closed-loop system covering "proposal - evaluation - approval - execution - settlement", involving multiple key nodes such as document standardization, price adjustment, construction period adaptation, and claim handling. Only by strictly following the established procedures and clarifying the operational requirements of each link can the interests of all parties be balanced, variation risks be reduced, and the orderly progress of the project be ensured. The following will detail the management key points and practical specifications of the full variation process.
(三)变更涉及的价款调整方法
Price Adjustment Methods Involved in Variations
价款调整是变更管理的核心焦点之一，需遵循公平合理、有据可依的原则：首先坚持合同定价优先原则，优先依据原合同约定的计价规则计算变更价款，如采用原合同单价、总价下浮比例或成本加酬金方式;其次，若变更涉及新增工作且原合同无对应单价，可按参考类似工作单价调整、依据当地市场价格及行业定额测算、双方协商确定并书面确认等方式处理;再次，价款调整需全面涵盖直接成本(人工、材料、设备)、间接成本(管理费用、规费)及合理利润，明确成本归集范围，避免重复计算或漏项;最后，若双方对价款调整存在分歧，可先依据合同约定的争议解决机制协商，协商不成可提交仲裁或诉讼，过程中需保留完整的成本核算资料与沟通记录，为争议处理提供有力支撑。
Price adjustment is one of the core focuses of variation management and must adhere to the principles of fairness, reasonableness, and evidence-based decision-making:First, adhere to the principle of contractual pricing priority: calculate variation prices in accordance with the pricing rules agreed in the original contract (e.g., adopting original contract unit prices, total price reduction ratios, or cost-plus-fee methods).Second, if the variation involves new work with no corresponding unit price in the original contract, adjustments may be made by referencing unit prices of similar work, calculating based on local market prices and industry quotas, or determining through bilateral negotiation and written confirmation.Third, price adjustment must fully cover direct costs (labor, materials, equipment), indirect costs (management fees, statutory fees), and reasonable profit, with clear cost attribution scope to avoid double counting or omissions.Finally, if disputes arise between the parties over price adjustment, they shall first negotiate in accordance with the dispute resolution mechanism agreed in the contract; if negotiation fails, arbitration or litigation may be initiated. During this process, complete cost accounting data and communication records must be retained to provide strong support for dispute resolution.
(四)变更相关的索赔管理
Claim Management Related to Variations
变更实施过程中难免引发额外成本或工期延误，需通过规范的索赔管理平衡各方利益。索赔触发需满足特定条件，若因业主方原因(如审批延误、指示不当)或外部不可抗力导致承包商额外支出成本、工期延误，承包商可依法提出索赔。索赔程序需严格遵循合同约定，索赔方需在规定时限内提交索赔意向通知书，随后补充详细索赔报告，如索赔事由、证据、费用计算依据、工期索赔金额等，业主或工程师在规定时间内审核答复，逾期未答复视为认可索赔请求。索赔成功的关键在于证据充分有效，需提供变更文件、施工记录、成本凭证、沟通记录、第三方检测报告等完整资料，确保索赔主张有坚实支撑。同时需明确变更与索赔的边界，变更导致的价款与工期调整属于合同约定的正常调整，不得重复索赔，因变更引发的额外损失需单独按索赔程序处理。
Extra costs or construction period delays are inevitable during variation implementation, and standardized claim management is required to balance the interests of all parties. Claims can only be triggered under specific conditions: if the contractor incurs additional costs or construction period delays due to employer-related reasons (e.g., delayed approval, improper instructions) or external force majeure, the contractor may file a claim in accordance with the law.Claim procedures must strictly follow contractual agreements: the claimant shall submit a notice of claim intention within the specified time limit, followed by a detailed claim report including claim reasons, evidence, basis for cost calculation, and amount of construction period claim. The employer or engineer shall review and respond within the specified time; failure to respond within the time limit shall be deemed acceptance of the claim request.The key to successful claims lies in sufficient and valid evidence, including complete documents such as variation documents, construction records, cost vouchers, communication records, and third-party inspection reports, to ensure solid support for claim assertions. Meanwhile, the boundary between variations and claims must be clarified: price and construction period adjustments resulting from variations are normal contractual adjustments and shall not be claimed repeatedly; additional losses caused by variations shall be handled separately in accordance with claim procedures.
(五)变更涉及的工期调整
Construction Period Adjustment Involved in Variations
工期调整需以变更对项目进度的实际影响为核心，兼顾合理性与公平性。调整依据需结合变更对施工关键线路的影响程度，参考原施工计划、变更实施进度、资源配置限制等因素，采用网络计划技术等科学方法测算工期调整时长。因变更导致工期延误的，若属于业主方或外部客观因素造成，需给予承包商工期补偿，若因承包商自身原因导致执行效率低下，不予工期补偿且需承担逾期违约责任。变更实施过程中，可通过优化施工流程、增加资源投入等方式压缩非关键线路工期，减少变更对总工期的影响，相关优化成本按合同约定或双方协商处理。工期调整结果需经业主或工程师书面确认，明确调整后的总工期及关键节点，避免后续因工期争议引发纠纷。
Construction period adjustment must center on the actual impact of variations on project progress, balancing reasonableness and fairness. Adjustment basis shall consider the impact of variations on the critical path of construction, reference factors such as the original construction plan, variation implementation progress, and resource allocation constraints, and adopt scientific methods (e.g., network planning technology) to calculate the duration of construction period adjustment.If construction period delays are caused by variations due to employer-related reasons or external objective factors, the contractor shall be granted construction period compensation; if delays result from the contractor’s own inefficiency, no compensation shall be given and the contractor shall bear liability for breach of contract due to delay.During variation implementation, the construction period of non-critical paths may be shortened by optimizing construction processes or increasing resource input to reduce the impact of variations on the total construction period. Relevant optimization costs shall be handled in accordance with contractual agreements or bilateral negotiation. The results of construction period adjustment must be confirmed in writing by the employer or engineer, clarifying the adjusted total construction period and key milestones to avoid subsequent disputes over construction period.
(六)超出合同范围的额外工作管理
Management of Additional Work Beyond Contract Scope
额外工作与变更存在本质区别，需单独建立规范的管理机制。首先明确边界界定，额外工作是指超出原合同约定工程范围、无法纳入变更范畴的新增工作，需与变更严格区分，避免 “变更” 名义下的变相新增合同。额外工作需由双方签订补充协议，明确工作内容、技术标准、价款结算方式、工期要求及权责划分，避免无协议情况下擅自施工。补充协议需履行与原合同一致的合规审批程序，涉及重大投资的需经相关监管部门或决策机构批准，确保程序合法合规。额外工作的实施、验收、结算需参照原合同相关约定执行，同步纳入项目整体管控体系，避免与原工程脱节导致质量、进度、成本失控。
Additional work is essentially different from variations and requires a separate standardized management mechanism.First, clarify boundary definition: additional work refers to new work that exceeds the scope agreed in the original contract and cannot be categorized as variations, which must be strictly distinguished from variations to avoid "disguised new contracts" in the name of "variations".Second, a supplementary agreement shall be signed by both parties for additional work, specifying work content, technical standards, price settlement methods, construction period requirements, and division of rights and responsibilities to prevent unauthorized construction without an agreement.Third, the supplementary agreement shall go through the same compliance approval procedures as the original contract; for additional work involving significant investment, approval by relevant regulatory authorities or decision-making bodies is required to ensure procedural legality and compliance.The implementation, acceptance, and settlement of additional work shall be executed with reference to relevant provisions of the original contract and synchronously incorporated into the overall project management system to avoid disconnection from the original project leading to loss of control over quality, progress, and cost.
四、国际EPC项目变更纠纷典型案例解析
Analysis of Typical Cases of Variation Disputes in International EPC Projects
(一)南美洲波哥大地铁一号线项目——数字化系统赋能多场景变更协同管理
Bogotá Metro Line 1 Project in South America – Digital Systems Empowering Multi-Scenario Variation Collaborative Management
作为中国港湾在美洲区域的大型国际 EPC 项目，波哥大地铁一号线项目涵盖 6 个工作面、23 个工作地点，细分 1000 个工作分项，且参与方来自全球，存在语言文化差异大、线下管理效率低、变更索赔单据易丢失等痛点，传统变更管理模式难以适配项目复杂度，数字化工具成为突破管理瓶颈的核心手段。
项目团队搭建 “项目现场控制管理系统(PCS)”，将变更索赔、计量结算、人员设备管理等核心环节纳入数字化管控，形成全流程闭环。在变更管理层面，系统严格遵循 FIDIC 条款中 “同期记录保存” 要求，为变更索赔提供完整数据支撑：变更事件发生后，分包单位可在线发起变更申请，附施工记录、现场照片、成本核算等支撑材料，系统自动同步至业主、监理及总包相关模块，实现跨主体实时协同;变更审批过程中，各参与方可在线批注意见、追溯审批节点，避免线下传递导致的延误与单据丢失;变更实施后，系统自动关联计量结算模块，根据变更确认的工程量与计价规则，精准计算变更价款，且所有数据不可删除、操作留痕，满足国际工程对变更依据可追溯的严格要求。
截至2024年8月，该系统已处理 183 条变更索赔记录、661 条计量结算记录，有效解决了跨国项目变更沟通滞后、证据保存困难等问题。其核心启示在于：国际 EPC 项目变更管理需借助数字化工具打破地域与文化壁垒，通过标准化流程与实时数据共享，提升变更审批效率与合规性，同时为争议处理留存坚实证据链，这一模式对复杂跨国工程的变更管控具有重要借鉴意义。[1]
As a large-scale international EPC project of China Harbour Engineering Company in the Americas, the Bogotá Metro Line 1 Project covers 6 construction faces, 23 work locations, and 1,000 subdivided work items, with participants from around the world. It faces pain points such as significant language and cultural differences, low offline management efficiency, and easy loss of variation/claim documents. Traditional variation management models cannot adapt to the project complexity, making digital tools the core means to break through management bottlenecks.
The project team built a "Project Site Control System (PCS)", integrating core links such as variation/claim management, measurement and settlement, and personnel/equipment management into digital control to form a full-process closed loop. In terms of variation management, the system strictly complies with the "contemporaneous record keeping" requirement in FIDIC clauses, providing complete data support for variation claims:
After a variation event occurs, subcontractors can initiate variation applications online, attaching supporting materials such as construction records, on-site photos, and cost accounting; the system automatically synchronizes to relevant modules of the employer, supervisor, and general contractor to achieve real-time cross-entity collaboration.
During variation approval, all participants can comment online and track approval nodes, avoiding delays and document loss caused by offline transmission.
After variation implementation, the system automatically links to the measurement and settlement module, accurately calculating variation prices based on the confirmed engineering quantities and pricing rules; all data is non-deletable with operation traces retained, meeting the strict traceability requirements for variation evidence in international engineering.
As of August 2024, the system has processed 183 variation/claim records and 661 measurement/settlement records, effectively solving problems such as delayed cross-border variation communication and difficult evidence preservation. The core insight is: variation management in international EPC projects must leverage digital tools to break geographical and cultural barriers, improve the efficiency and compliance of variation approval through standardized processes and real-time data sharing, and retain a solid evidence chain for dispute resolution. This model provides important reference for variation control in complex cross-border engineering.
(二)巴基斯坦SAPT集装箱码头工程——BIM技术前置规避设计变更风险
Pakistan SAPT Container Terminal Project – BIM Technology Preemptively Mitigating Design Variation Risks
巴基斯坦 SAPT 集装箱码头工程是南亚首个自动化专业集装箱深水码头 EPC 项目，陆域总面积约 32 万平米，设计年吞吐量 310 万 TEU。项目面临海外设计报批周期长、多专业管网碰撞易引发后期变更、跨语言沟通效率低等典型国际 EPC 项目难题，团队将 BIM 技术贯穿设计、施工、验收全流程，以技术手段从源头减少变更，实现变更风险前置管控。
在设计阶段，项目基于 BIM 技术搭建参数化构件库，完成全专业三维模型整合，通过碰撞检测功能提前识别堆场繁杂管网间的空间冲突 —— 共排查出管线交叉、设备与结构干涉等问题 230 余处，均在施工前优化设计方案，避免了传统二维设计中 “边施工边改图” 的被动局面，直接减少设计变更成本约 120 万美元。同时，利用 BIM 模型的可视化特性，团队与业主、当地咨工进行设计方案沟通时，可直观展示码头自动化设备布局、管线走向等核心内容，有效解决跨语言交流障碍，设计报批周期较同类项目缩短 25%，避免因报批反复修改引发的变更。
施工阶段，项目将 BIM 模型与现场施工进度联动，通过移动端应用实时比对工程实体与模型差异，一旦发现偏差立即分析是否需要变更，并同步更新模型数据。例如，在自动化轨道安装过程中，通过 BIM 模型与现场测量数据的比对，及时发现轨道基础标高偏差，快速调整施工方案，避免偏差扩大导致的重大变更。项目最终实现 “工程实体与 BIM 模型同步建设”，变更发生率较行业平均水平降低 40%，不仅节约工期 3 个月，更形成完整的数字化资产，为后期运维提供数据支撑。
该案例充分证明，国际 EPC 项目变更管理需从 “事后应对” 转向 “事前预防”，借助 BIM 等技术工具优化前期设计、提升沟通效率，可大幅减少因设计缺陷、信息不对称引发的变更，同时为变更决策提供精准数据支持，是技术驱动型变更管控的典型实践。[2]
The Pakistan SAPT Container Terminal Project is the first automated professional deep-water container terminal EPC project in South Asia, covering a land area of approximately 320,000 square meters with a designed annual throughput of 3.1 million TEUs. The project faced typical challenges of international EPC projects such as long overseas design approval cycles, frequent late-stage variations caused by multi-professional pipeline collisions, and low cross-language communication efficiency. The team integrated BIM (Building Information Modeling) technology throughout the design, construction, and acceptance phases, using technical means to reduce variations from the source and achieve preemptive control of variation risks.
In the design phase:
The project built a parametric component library based on BIM technology, completed the integration of full-professional 3D models, and identified spatial conflicts among complex yard pipelines in advance through collision detection – over 230 issues such as pipeline crossings and equipment-structure interference were identified and resolved by optimizing design schemes before construction. This avoided the passive situation of "revising drawings during construction" in traditional 2D design, directly reducing design variation costs by approximately 1.2 million US dollars.
Utilizing the visualization feature of BIM models, the team intuitively demonstrated core content such as the layout of terminal automation equipment and pipeline routing when communicating design schemes with the employer and local consulting engineers, effectively resolving cross-language communication barriers. The design approval cycle was shortened by 25% compared with similar projects, avoiding variations caused by repeated revisions during approval.
In the construction phase:
The project linked BIM models with on-site construction progress, real-time comparing differences between physical engineering and models through mobile applications. If deviations were found, the need for variation was immediately analyzed and model data was updated synchronously. For example, during the installation of automated tracks, elevation deviations of track foundations were timely detected by comparing BIM models with on-site measurement data, and construction schemes were quickly adjusted to avoid major variations caused by expanded deviations.
The project ultimately achieved "synchronous construction of physical engineering and BIM models", with the variation rate reduced by 40% compared with the industry average. This not only saved 3 months of construction period but also formed complete digital assets to support later operation and maintenance.
This case fully proves that variation management in international EPC projects must shift from "post-event response" to "pre-event prevention". Leveraging technical tools such as BIM to optimize early design and improve communication efficiency can significantly reduce variations caused by design defects and information asymmetry, while providing accurate data support for variation decision-making – a typical practice of technology-driven variation control.
五、结论
Conclusion
国际 EPC 项目的变更管理是一项系统性工程，需以合同为核心、以流程为支撑、以风险控制为目标，贯穿项目全生命周期。在多元文化、复杂环境的背景下，各方需严格遵循合法性、书面化、公平合理等基本原则，精准识别变更原因与类型，规范执行“提议-评估-审批-执行-结算”全流程。
通过完善变更文件管理、明确价款与工期调整规则、强化索赔与争议处理机制，可有效降低变更引发的风险，保障各方合法权益。同时，项目参与方需加强前期准备工作，优化设计与合同条款，减少先天不足导致的变更。在履约过程中保持高效沟通，协同应对外部环境变化，实现变更的规范化、精细化管控。未来，随着国际工程合作的深化，变更管理需进一步适配数字化、智能化趋势，通过信息化管理系统提升流程效率与风险预判能力，为国际 EPC 项目的成功实施提供坚实保障。
Variation management in international EPC projects is a systematic project that must take contracts as the core, processes as support, and risk control as the goal, running through the entire project life cycle. Against the backdrop of multiculturalism and complex environments, all parties must strictly follow basic principles such as legality, documentation, and fairness, accurately identify variation causes and types, and standardize the implementation of the full "proposal-evaluation-approval-execution-settlement" process.
Improving variation document management, clarifying price and construction period adjustment rules, and strengthening claim and dispute resolution mechanisms can effectively reduce risks caused by variations and protect the legitimate rights and interests of all parties. Meanwhile, project participants shall strengthen early preparation, optimize design and contract clauses to reduce variations caused by inherent deficiencies, maintain efficient communication during performance, and collaboratively respond to changes in the external environment to achieve standardized and refined variation control.
In the future, with the deepening of international engineering cooperation, variation management must further adapt to the trends of digitalization and intelligence, improve process efficiency and risk prediction capabilities through information management systems, and provide solid guarantee for the successful implementation of international EPC projects.
注释及参考文献
注释：
[1]中国对外承包工程商会。国际工程行业数字化转型案例展示 62|基于南美洲某轨道建设工程的项目管理系统的应用 [EB/OL]. https://www.chinca.org/CICA/info/25030315400511, 2025-03-03.
[2]深圳市招商港湾集团有限公司。巴基斯坦 SAPT 集装箱堆场与房建二期项目奠基暨开工典礼隆重举行 [EB/OL]. http://www.cmhg.com.cn/xwzx/462.html, 2025-07-04.
参考文献
一、中国国内法、司法解释等文件：
[1]《中华人民共和国民法典》
[2]《中华人民共和国建筑法》
[3]《中华人民共和国招投标法》
[4]《建设工程质量管理条例》
[5]《最高人民法院关于审理建设工程施工合同纠纷案件适用法律问题的解释(一)》
二、学术著作：
[6]吕文学，张水波：《FIDIC设计建造和运营项目合同条件导读与解析》，中国建筑工业出版社2010年版
[7]FIDIC：《Conditions of Contract for Construction (Red Book)》(第2版)，Geneva: FIDIC Publications，2017年版
[8]朱中华：《FIDIC EPC合同实务操作 详解·比较·建议·案例》，中国建筑工业出版社2013年版
三、网络资源：
[9]中国对外承包工程商会。国际工程行业数字化转型案例展示 62|基于南美洲某轨道建设工程的项目管理系统的应用 [EB/OL]. https://www.chinca.org/CICA/info/25030315400511, 2025-03-03.
[10]深圳市招商港湾集团有限公司。巴基斯坦 SAPT 集装箱堆场与房建二期项目奠基暨开工典礼隆重举行 [EB/OL]. http://www.cmhg.com.cn/xwzx/462.html, 2025-07-04.