What Is an Engineering Change Order?

Changes refer to various types of changes within the scope of contract work, including changes in contract work, changes in the amount of contract work, design changes due to geological reasons, etc. According to the actual situation, the structure size, elevation change, any work outside the contract, etc.

project changes

Right!

Changes refer to various types of changes within the scope of contract work, including changes in contract work, changes in the amount of contract work, design changes due to geological reasons, etc. According to the actual situation, the structure size, elevation change, any work outside the contract, etc.

Chinese name

project changes

Foreign name

Engineering Change

Field

project

Range

Material, technology, function, efficacy, size

The so-called engineering change (EC, Engineering Change), during the implementation of the project, in accordance with the procedures agreed in the contract, the supervisor according to the needs of the project, issued instructions on the original design in the bidding document or the construction plan approved by the supervisor , Process, function, efficacy, size, technical index, project quantity and construction method, etc. are collectively referred to as engineering changes.

1. Immediate change: When a major defect occurs in the product, it is a quality problem of a key part after tracing, and decisive measures are taken to prevent the influence from expanding. This situation exists in many kinds of products, such as automobiles and airplanes in transportation vehicles, and computers and communication equipment in information products. In severe cases, not only the defective parts in the warehouse and the field must be dealt with, but even the sold products sometimes have to be sold. Try to replace parts.

2. Run out of changes: Most engineering changes fall into this category, meaning that new materials are used after the old materials are used up.

3 A certain batch of changes: In some industries, the working procedures are very rigorous. If the materials used in the work order are different from those in the standard material list, the application procedure can be used to change it (although the standard material list of the product has not changed).

4 Alternative day change: Refers to a specific date as the time indicator for the project change to take effect.

5. Cumulative production quantity change: For some products produced by imported kits (KD, Knock Down), in order to effectively control the related design changes of KD and Local components, the cumulative quantity of products is used as the production quantity indicator for the control changes to take effect.

Management topics involved in engineering changes

Engineering changes involve a wide range of management topics, such as bill of materials management, change requests (

1. Change the elevation, baseline, position and size of relevant parts of the project;

2. Increase or decrease the amount of works agreed in the contract;

3 Increase or decrease the project content agreed in the contract;

4 Change project quality, nature or project type;

5. Change the construction order and time schedule of related projects;

6. Any kind of additional work that must be performed to complete the project.

1. Design documents are the main basis for arranging construction projects and organizing construction. Once the design is approved, it cannot be changed arbitrarily. Construction can only be organized after the project approval has been approved in accordance with these measures;

2. Project changes must adhere to a highly responsible spirit and a strict scientific attitude. On the premise of ensuring the quality standards of the project, when there are significant benefits in reducing project cost, saving land, and accelerating construction progress, engineering changes should be considered;

3 For engineering changes, a thorough investigation should be carried out in advance, with graphic information. The requirements are the same as the current design to meet the construction needs, and fill in the "Change Design Report Form", detailing the reasons for the design changes (soft soil treatment should be accompanied by soil sample analysis. , Deflection detection or bearing capacity test data), change plan (attached schematic diagrams and on-site pictures), technical and economic comparison with the original design (fill in estimated costs without unit price), according to the approval authority of this method, report for approval, not Approved shall not be constructed according to the changed design;

4 The design requirements and depth of engineering drawings are equal to the original design documents.

According to different departments that file change requests and change requests, engineering changes are divided into three categories: changes in the preparation office, changes in the construction unit,

1. Owner's reason: Changes in contract content such as changes in project scale, use functions, process flow, quality standards, and changes in construction period.

2. Design reasons: design errors and omissions, design adjustments, or design changes due to natural factors and other factors.

3 Construction reasons: due to the need for construction quality or safety, the construction method, operation sequence, and construction technology should be changed.

4 Reasons for supervision: The supervision engineer proposed changes in the construction process and construction order due to the consideration of project coordination and the control of the project objectives.

5. Reason for the contract: Due to changes in objective conditions, some clauses of the original contract need to be revised and supplemented based on actual conditions.

6. Environmental reasons: Unpredictable natural factors and changes in the external environment of the project cause changes in the project.