The application of BIM Technology is expected to change these disadvantages.
The design change shall be made as early as possible.
Reasons of the designer: design errors and omissions, inadequate design, design adjustment, or modification of specifications and standards, or design changes due to natural factors and other factors, or inconformity with the site, unable to construct, must be changed, etc; 3.
However, transforming the change management process from traditional low efficiency, long cycle and high cost to efficient, timeliness, dynamic cost control and orderly management will give full play to the value of BIM.
Change the project quality, nature or type; 5.
The key to the application of Bim in construction change management is process reengineering.
Engineering changes are mainly engineering design changes, but changes in construction conditions and schedule will also cause engineering changes.
However, transforming the change management process from traditional low efficiency, long cycle and high cost to efficient, timeliness, dynamic cost control and orderly management will give full play to BIM’s value.
It is temporary and irregular and covers a wide range, such as design change, concealed works, material substitution The change of construction conditions is one of the key factors affecting the project cost.
Increase or decrease the quantities agreed in the contract; 3.
If it is changed in the design stage, only the drawings need to be modified, other expenses have not been incurred and the loss is limited; If it is changed in the procurement stage, not only the drawings need to be modified, but also the equipment and materials must be re purchased; If changes are made in the construction stage, in addition to the above costs, the demolition costs of the constructed works must be increased, which is bound to cause significant change losses.
02 contents of engineering change 1.
Engineering change shall have significant effect on improving function, ensuring quality, reducing cost and accelerating progress; 3.
Some changes are beneficial and necessary, while others are unnecessary and destructive.
Change the construction sequence and schedule of relevant projects; 7.
Change the house type layout, building height and floor height; 6.
Generally, the cost of design change shall be controlled within 5% of the total cost of construction and installation project, and the new investment generated by design change shall not exceed one third of the basic reserve fund.
Sometimes, emergencies and special geological conditions are encountered, sometimes it is purely for the convenience of construction and labor saving, and some are re quoted through design change to make up for the loss of low bidding quotation.
If a model house is made, it will be changed.
BIM is applied to engineering design, so how is it applied in construction management? First of all, we should know what engineering change is.
Design documents are the main basis for arranging construction projects and organizing construction.
What’s more, some bad contractors buy the design, Modify the as built drawings in favor of the contractor to seek improper interests.
2.
It is caused by improper communication among members of various disciplines or limitations of designers.
Some changes are the improvement of requirements and functions.
Increase or decrease the project content agreed in the contract; 4.
The construction results seen by the owner deviate from what he wants.
01 criteria for deciding whether to change 1.
Municipal leaders often patronize these engineering projects.
04 factors of project change 1.
Reasons of the employer: changes in the owner’s own needs, changes in project scale, use function, process flow, quality standards, changes in construction period and other contract contents.
Contractor’s reason: due to the need of construction quality or safety, the construction method, operation sequence and construction technology are changed.
Engineering change (EC) refers to the change for the project that has been officially put into construction.
Site visa refers to the signing certificate made by the owner and the contractor on the implementation of additional construction contents other than the contract price in the process of project construction according to the contract.
Click the blue word above today The key to the application of Bim in construction change management is process reengineering.
Even the formal project is pushed back because of unsatisfactory results and dissatisfaction, and the time of this change can not be controlled.
Designers and construction personnel are miserable.
The earlier the change occurs, the smaller the loss, and vice versa.
03 principle of engineering change 1.
Change the elevation, position and size of relevant parts of the project; 2.
Change is inevitable, especially hardcover.
Sometimes it is a construction error and has to require design change to make the error legitimate; 4.
If the change process is not managed properly, it will have a high price.
Unplanned changes are the main reason for the delay and cost increase of the project.
Any kind of additional work necessary for the completion of the project.
Zero construction change is just a beautiful vision.
Construction without approval shall not be carried out according to the changed design; 4.
During the implementation of the project, changes in materials, processes, functions, structures, dimensions, technical indicators, quantities and construction methods of part or all of the project in accordance with the procedures agreed in the contract.
However, transforming the change management process from traditional low efficiency, long cycle and high cost to efficient, timeliness, dynamic cost control and orderly management will give full play to BIM’s value.
Some owners are “change addicts”, sometimes on a whim, they ask to dismantle and redo, and the construction personnel are terrified when they see these owners coming.
Any design change must be handled according to the design change, and can not be solved by on-site visa.
There shall be strict procedures for engineering change.
If they do not meet his preferences and aesthetic standards, they have to be modified.
Zero construction change is just a beautiful vision.
The owner can’t feel good or bad by looking at the drawings and models.
The nature of design change and site visa is quite different.
Impact of implementation change on the project (progress, cost and quality).
Due to changes in objective conditions, some terms of the original contract need to be revised and supplemented in combination with the actual situation, such as design changes caused by geological reasons.
Engineering changes proposed at drawing review and technical disclosure meeting; 8.
Once the design is approved, it shall not be changed at will and the scope of change shall not be expanded at will; 2.
The drawing design requirements and depth of engineering change are the same as the original design documents.
Zero construction change is just a beautiful vision.
Risks brought to the project by implementing the change; 2.
Risks to the project caused by non implementation of changes; 3.
There are also some key government projects.
This is due to the lack of a good communication platform.
Changes are often corrective changes, that is, a kind of error correction for previous design defects and errors.
As a change management, a complete and rigorous change process is formulated in the early stage of the project to control all economic changes caused by construction and design changes.
Design alternation refers to the change and modification of the design standard state expressed in the original construction drawings and design documents by the design department.
Evaluate the cost effect of the design change, provide the increase or decrease estimation of the project cost for the design change to the contract procurement department of the group, and provide the basis for the bidder’s prior change decision and the budget adjustment after the change..
The key to the application of Bim in construction change management is process reengineering.
The reason for change, change scheme and technical and economic comparison with the original design shall be stated and submitted for approval.
Reason of the supervisor: the change of construction process and construction sequence proposed by the supervising engineer for the sake of project coordination and favorable control of project objectives; 5.
05 engineering change analysis engineering change has become the norm, and almost all engineering projects may change or even change frequently.
Engineering changes are to implement the personal will of the leaders and are often beyond recognition.
06 engineering change countermeasures the cost engineer shall calculate and analyze the change content and cost before the change.
Other reasons: unforeseen natural factors, changes in the external environment of the project and the trend of architectural style lead to changes in the project.
Even if there is no blueprint, he can make professional judgment, change necessity analysis and comprehensive balance according to the concept and description, that is, seek a new balance between function increase and cost increase.
