Dear TeamCAD website visitors,

We continue to cover interesting topics related to the BIM workflow. As I announced in my previous article, "Data Management In The Digital Twin Of The Building", in this article, I am going to cover a topic about BIM Execution Plan – BEP.

I think it would be very useful to define the terms at the very beginning of this article that I will use extensively throughout this article.

What is BEP

BIM Execution Plan - BEP is the default and necessary document of every BIM project in the construction industry. The role of BEP is to define various aspects of the BIM project process implementation, in addition to the contract between the designer, contractor and investor. Since BEP does not yet have the power of a contract, it is usually attached as an addendum to the contract between the designer, contractor and investor, thus introducing an orderly and predefined relationship between participants in the BIM project process.

BEP Building Execution Plan

At the very beginning of the article, it is important to note that BEP development is entrusted to the BIM manager on the project, which is, in most cases, employed or hired by the investor himself. It is important to note that no clear recommendation or law is governing the obligations of participants in the BIM project process, regarding obligations on the responsibility of BEP design, but it seems most logical that BEP design falls into the domain of investors for the following reasons:

  • the investor finances the entire project process, including the preparation of project documentation at all project stages, then the construction itself and finally the development of a BIM as built model, which the investor will use as a digital twin to calculate the operating life cycle costs of the facility and the equipment built into it;
  • By designing a BEP, the investor clearly and unambiguously sets the required BIM standards to be applied by the designer and contractor, which will best fit into the formats and workflows of the investor;
  • By designing BEP, the investor ensures the consistency of modeling, convention of naming objects or parameters in BIM model disciplines to establish a process of automation of data generation;
  • By designing BEP, the investor ensures consistency of BIM data generation and BIM modeling, which at the end of the design process will allow the investor to efficiently reach the digital twin of the facility and the equipment built into it.

A characteristic BEP usually contains the following typical BIM project management chapters:

  • Project management;
  • Format for delivery and exchange of BIM documentation;
  • Technical details of the BIM project;
  • BIM multidisciplinary collaboration;
  • LOD - level of development of BIM elements
  • CDE - a common data environment;

Below, we are going to look at each typical BEP chapter individually by giving a detailed explanation of their purpose as well as their content.

Project management

The purpose of the BEP chapter on project management is to define the scope of implementation of BIM technologies, for all participants and disciplines in the BIM project process. This chapter also assigns investor requirements and roles to teams and disciplines in the BIM project process and key dates for the start, completion and delivery of BIM project documentation. Also, the project management chapter defines the process of approval of BIM project documentation by investors.

Upravljanje projektom

Format For Delivery And Exchange Of BIM Documentation

The BEP chapter on the BIM documentation delivery format is intended to define in the BIM project process all aspects necessary for the successful and optimized functioning of the entire project team in all disciplines in the project. In this chapter of BEP, the most commonly defined are units that will be used during all project phases. Then, the BIM model formats (.rvt, IFC, nwd, xlms, etc.) are defined to be exchanged between disciplines during the project process and later, BIM model formats to be delivered to the investor. Other BIM project documentation formats such as data formats (.xlsx, db, odbc, etc.) and various reports and specifications (.doc, xlsx, pdf, bcf, etc.) are also defined.

Technical Details Of The BIM Project

The chapter on the technical details of a BIM project aims to standardize and classify data, to regulate how it is generated and delivered at the end of each project phase or the end of the BIM project process. It is common for this chapter to include "BIM modeling convention ", which defines naming conventions for BIM elements to achieve BIM design process automation and the ability to update and monitor all BIM data parameters after handing over a BIM digital twin model to an investor at the end of the BIM design process. In addition to the aforementioned parts of the chapter on technical details of the project, in this chapter, it is also desirable to define the geographical data of the building that is the subject of the project design. Then, it is useful to define the software that will be used in the BIM project process. Last but not least, In the chapter on technical details of the BIM project process, it is common to see a detailed description of the output standard related to graphic documentation and data from the BIM model of all disciplines participating in the BIM project process.

BIM Multidisciplinary Collaboration

I believe that the goal of the investor is to get a fully coordinated project at the end of the BIM project process without collision between different disciplines in the project. In reality, that implies that the investor is going to get a fully coordinated multidisciplinary BIM model at the “as built project” stage done by the contractor. This BIM model means the BIM model of each discipline in the project process, which is combined into a multidisciplinary BIM model and where all BIM discipline models are fully coordinated ie. have the status of "zero clash BIM multidisciplinary model“.

This kind of makes perfect sense, given that the building and the equipment built into it are completely collision-free, so it is quite expected that the BIM model will be a perfect digital replica, ie. a digital twin of the building. I have written three articles on the topic of digital twins and their purpose, which detail the purpose and methodology of their creation - "What Are The Digital Twins?", "Digital Twins In The Construction Industry", "Data Management In The Digital Twin Of The Building". 

However, it should be borne in mind that during the BIM project process, starting from the conceptual design, at the end of each project phase (except the as built project), the BIM multidisciplinary model does not imply a multidisciplinary BIM model without collision between different disciplines in the project. The process of moving from coarse BIM discipline models to a fully coordinated multidisciplinary BIM model is achieved by BIM virtual coordination meetings (VDRs ), where a visual review of the BIM discipline model is performed and a collision detection test is performed. It is expected that as project phases progress, there is going to be fewer collisions, but it is unrealistic to expect a BIM multidisciplinary model without collisions between different disciplines until the as built project, because many collisions can be solved on the construction site, while on the other hand there is no sense in solving some of the collisions in the early stages of the project due to the investor costs, as long as those collisions do not significantly compromise the coherence of the project of different disciplines.

It would be best if the whole process of BIM virtual coordination meetings (VDRs) is managed by a BIM Manager or a BIM Consultant on a project, either employed or hired by the investor. The process from coarse BIM models to a fully coordinated multidisciplinary BIM model can save a lot of money for an investor if it is managed by an experienced BIM Manager or BIM Consultant. The frequency of BIM virtual coordination meetings cannot generally be defined, but it is common for BIM virtual coordination meetings to be held once a week or once every two weeks. It is desirable for the BIM Manager or BIM Consultant to keep a record during the BIM virtual coordination meeting and, after the meeting, to report on the progress of the BIM discipline models and project coordination ie. coordinate the BIM disciplines with each other and submit that report to the investor.

At the very end of the chapter on BIM multidisciplinary collaboration, we should mention that there are LOD (Level Of Development) Engagement Protocols, which in some countries respect the predefined format of BIM parts, during the various project phases. However, most commonly, the level of development of the BIM elements in the project process is related to the different project phases and is usually attached as an integral part of the BEP. The level of development of BIM elements is going to be discussed in the next chapter.

LOD - Level Of Development Of BIM Elements

This chapter defines the level of development of BIM elements according to the project phase in which the project teams of each discipline in the BIM project process are. In this BEP chapter, the investor defines the levels of development of BIM elements during all stages of the design process and places them before the designer and contractor, not only in terms of the graphic requirements of the BIM model but also in terms of the data that the BIM elements contain.

The consistency of the level of development of the BIM elements and the project phases is a very broad topic, of which I am going to give much more detail in my next article, and therefore I ask the readers for some patience on this subject.

LOD - Level of development

CDE - A Common Data Environment

The last typical BEP chapter, as its name clearly suggests, defines the environment where the BIM project will be done. This means in practice that this chapter defines how to exchange models of different disciplines in the BIM project process, then the frequency of BIM model exchange, the server where the BIM models and the data related to them will be uploaded, etc. The traditional way of exchanging BIM models, data from the BIM models and generally the complete project process does not give the investor the ability to check the progress of the BIM project process at any time during the project process. However, this can be compensated by an investor hiring a BIM Manager or BIM Consultant.

Therefore, it is very useful for all participants in the BIM project process - including designers of different disciplines, contractor and investor - to work in a cloud-based project environment where there is no upload of updated BIM discipline models. In a cloud-based project environment, BIM discipline models remain virtually in the cloud all the time and are updated in real-time, and BIM models can be considered "alive". This means that every change in the BIM model made by the participants in the project is reflected in the BIM model of discipline in the cloud. This provides maximum transparency to all participants in the BIM project process and helps to identify multidisciplinary problems in the project process faster and to solve them in the early project stages.

It is not my intention to give a final judgment or impose my own opinion, but after really many projects in different cloud common project environments, my opinion is that the BIM 360 provides the best opportunities for permanent coordination between different BIM discipline models in the BIM project process, because all changes are visible after the data in the BIM discipline model is synchronized. Such a BIM workflow enables the investor or his BIM Consultant to constantly monitor the progress of the project and the level of compatibility of the BIM model disciplines at any point in the project process.

Common data environment

At the very end of the article, I would like to make a summary of everything I have outlined in the article.

BEP is a necessary document for the successful implementation of BIM technology on a project where the investor places a BIM claim on the project participants. It is logical that BEP development is the responsibility of the investor, as he pays for all project life cycle costs - from the conceptual design to the as built project. Depending on the experience of the BIM Manager or BIM Consultant hired by the investor to design the BEP and oversee the implementation of the requirements contained in the BEP, the investor himself can make significant savings at all stages of the project process. In the end, it is possible to have a BIM as built model with installations - a future digital twin of the facility, which he can hand over or sell to a future facility user to track the life cycle cost of the facility and the equipment built into it. If an investor is also a future user of a facility, creating a BEP by the investor, by hiring a BIM Manager or BIM Consultant and overseeing the implementation of the requirements contained in it, seems like the only logical option.

I would like to conclude with an article on "What Is BEP And What Should It Contain?" and my view of how it can help an investor in many areas by optimizing costs and achieving better functionality, both for facilities that are not made or built and for facilities that are built. I would also like to take this opportunity to announce to you my next article "What Is LOD - The Level Of Development Of BIM Elements".

If you have any questions, comments or want to know more details about the topic I covered under "What Is BEP And What Should It Contain?", please contact TeamCAD, who will be happy to provide you with additional information.

Also, if you need any help with BEP development or BIM consulting services to optimize the BIM project process, TeamCAD will be happy to support you.

Until next time,
Predrag Jovanovic

 

::

Previous articles on the similar topic:

"Data Management In The Digital Twin Of The Building" 

"Digital Twins In The Construction Industry" 

"What Are The Digital Twins?"

"Small But Big Savings in The BIM Workflow - Examples" 

"BIM Workflow Automation"

"Advanced BIM data management"



Dear TeamCAD website visitors,


We continue to cover interesting topics related to the BIM workflow. As I announced in my previous article, "Digital Twins In The Construction Industry", in this article, I am going to cover an exciting topic about data management in digital twins.

In the previous two articles, "What are digital twins" and "Digital twins in the construction industry", I tried to explain in the best possible way what digital twins are in a broad sense, what is their potential, in what areas they can be used and make significant savings and finally - what digital twin represents and what its value is, whether it is about building project or the already constructed building. In this article, I have the intention to complete the story of digital twins and to give you an idea of how to manage data after the creation of a building digital twin in the best way.

Let's start with the assumption that the investor, owner, user of the facility, and / or facility manager is interested in creating a digital twin model of the building he is using, as well as interested in monitoring, forecasting and managing the facility's maintenance and life cycle costs. For such a thing he needs:

  • The contract and the BIM Execution Plan, which clearly defines the obligations of the investor and the legal entity that will create and maintain the digital twin model. I am going to give more details on this topic below;
  • BIM as built model, which reflects a perfect, as built copy of the constructed building and the equipment built into it (digital twin model);
  • A digital twin model containing parameters valuable for monitoring the life cycle of a building and the equipment built into it;
  • Permanent maintenance of the geometry and parameters of the digital twin model after each intervention on the building and the equipment built into it;
  • Generation and labeling of elements QR codes in a building or part of equipment over which an intervention is performed and labeling with an identical QR code of an identical element in a digital twin model to coordinate real-world building data and its digital twin model in the digital world.

The Building’s Digital Twin Creating and Maintenance Contract and BIM Execution Plan

The primary role of the building’s digital twin creating and maintenance contract is to clearly define the rights and obligations of the building user on the one hand and the company that will be engaged in the creation and maintenance of the digital twin on the other. It turned out very useful to include in the creating and maintenance contract a company that will provide maintenance services for the constructed facility and the equipment built into it, i.e., facility manager. This greatly minimizes the possibility of communication problems on the relation building user - facility manager - maintaining the digital twin of the building.

Namely, in contracts that clearly define the rights and obligations between the interested legal entities engaged in the maintenance of the existing building, it is crucial to define clearly and unambiguously the procedures from the appearance of the need for intervention on the building to noting it in the digital twin model, i.e., to update it.

Digital Twins Creation and Maintenance Contract

BIM Execution Plan, in addition to the building’s digital twin creating and maintenance contract, represents a document which has the power of the contract and it is written in the form of contract addition where it is defined:

  • Methodology for creating building digital twin model;
  • Level of Detail (LOD) i.e., the level of detail of the geometry of each type of graphic element within the digital twin model;
  • Elements of the building and equipment that will be subject to processing in the digital building twin model database;
  • The parameters in the digital twin model that will be assigned to the graphic elements of the model to track them in terms of maintenance costs and the life cycle of the facility and the equipment built into it;
  • The manner of issuing orders and labeling for intervention on the constructed facility;
  • A way to update the digital twin and the data itself in the building database after the intervention;
  • Documenting all changes made to the building and the equipment built into it in the digital twin model, not only by changing the geometry of the digital twin model, but also establishing a link between the element in the digital twin model that was the subject of the intervention and the attachments, invoice scans, textual description of the work and how to make changes, as well as other relevant documentation related to that element in the digital twin model.

BIM Execution Plan


In the end, it is essential to note in the contract that it is desirable to define the costs of maintaining a digital twin model. In most cases, the item in the maintenance contract involves paying by the facility user after an intervention order is issued, which is a less favorable option for the user. The second most common option is the annual subscription of the facility user to a company that is contractually obliged to update the model and document any changes to the digital twin model after each order and intervention.

Creating Of The Digital Twin Of The Building

To understand how digital twin data of the building is managed, I must indicate to you that the methodology for generating data is not the same for the digital twin that is the subject of the project and the digital twin that is generated based on data from the as built project if the owner or user of the building has it. Even more complicated is the situation where the owner or user of the building does not own the as built project, so before creating a digital twin, it is necessary to perform a building observation, which requires a lot of manual and not so intellectual work. Finally, there is the possibility of laser scanning of an existing object. Still, the purpose of the generated point-cloud 3D model of a digital twin of an existing building is highly questionable from a BIM point of view.

Digital Twin Model illustration


Let’s consider these four cases:

  • The digital twin model generated during the BIM workflow is essentially a model generated after the building construction and can be considered as an as built project. As I mentioned in the previous article, if the investor adequately hired his BIM manager, who constantly checked the coordination of the constructed building with the digital as built model, it can be said that with certain, not so large additional works on the digital as built model, the investor can easily have the digital twin model;
  • Digital twin model generated from the as built project using 2D drawings and additional project documentation is a far more complicated case since it requires a lot of BIM modeling, assigning adequate parameters to the elements in the digital twin and linking those parameters to a database that documents all future repairs and works on the facility. I must mention that the responsibility for the validity of the drawings, as well as possible disagreements between the drawings of the as built project and the real constructed building, is the responsibility of the facility’s owner or user and that he is obliged to document all differences to the company engaged in the development of a digital twin model of that facility. To put it simply, any discrepancy between the current state of the facility concerning the as built project is the sole responsibility of the facility’s owner or user. Unless the user of the facility has documented the difference between the constructed facility and the as built project, the digital twin model cannot be described as a mistake by the company engaged in the digital twin creation.
  • The digital twin model generated from the observation of the constructed building involves the engagement of a company or individuals who will record the complete facility and document that recording in a format acceptable to the company engaged in the creation of the digital twin model of the constructed building. The process itself places much responsibility on the company or individuals hired for observation of an as built facility. It should be borne in mind that such a scenario can only be imagined in buildings that were built in the distant past. Therefore, the propensity to malfunction and repairs is significantly higher than the recently constructed facilities whose owners or users own the as built project.
  • The digital twin model generated from laser scanning is a highly debatable digital twin model format. In my opinion, it cannot be considered an adequate model of a facility’s digital twin. It provides a visually acceptable model, where its elements can get some attributes through their labeling. The problem with the digital twin models thus generated is that the elements in that model are not intelligent and do not know whether they are a column, wall, or diffuser, so their systematization and data structuring in such models is challenging to achieve and very unreliable.

 

Issue an order for intervention using the digital twin model on the BIM 360 cloud platform

Does it seem too futuristic for you, as the facility’s owner or user, to order the maintenance technician of your facility to go to a specific location of your facility, identify the element on which to intervene, and then follow the instructions given to you by voice or text message to his smartphone, all from a digital twin model found on the BIM 360 cloud platform?

BIM 360 Cloud platform

This technology is possible and easily applicable. What is particularly fascinating is that when generating a ticket for a particular intervention, a QR Code or Unique ID number is automatically generated and assigned on the one hand to the element of the facility over which was intervened and, on the other, to an identical element in the digital twin model stored in the BIM 360. A once generated QR Code or Unique ID assigned to a specific element in a facility and an identical element in the facility's digital twin model allows you to track all interventions and history of all interventions on one or more elements in the facility and the facility's digital twin model.

BIM 360 and Digital Twin

More description of digital twin model maintenance in the BIM 360 cloud service, you can find on this link:
https://www.youtube.com/watch?v=NmwEm0j9VgY

Issuing a Ticket Using the Digital Twin Model in BIM 360 and Database Related to the Digital Twin Model

If you have read the text in the previous subtitle and watched the BIM 360 Ops video, I believe you are fascinated with how easily any change made to a real-world facility and a digital twin model in the digital world can be documented. In a very similar way, it is possible to create a ticket and monitor its implementation using databases and specific procedures. What is very convenient about databases is that it is possible to look at all interventions that have happened in the past, but also to write tickets that will be executed in the future based on the life cycle data of a a particular element in an existing facility and a digital twin model of an existing facility. Tracking incoming and previous costs with the help of a database, whether it is regular work, renovations, repairs, upgrades, or adaptation of a building to new regulations, allows the facility user the opportunity to view all the life cycle costs of the building. Doing so will significantly enable him to optimize his finances and provide significant savings.

BIM 360

Which data should the digital twin model contain?

The most straightforward answer to this question is - the building's digital twin model should contain all of the data that is valuable to the facility user and the facility manager for the effective maintenance of the constructed facility and the equipment built into it. Practically, there are no restrictions on the parameters of the digital twin model, so it can be said that the user, the facility manager and the company in charge of creating and maintaining the digital twin model in the BIM Execution Plan define all the parameters that are valuable primarily to the facility user.

However, it proved to be that the data that are most often the default parameters in the digital twin model are related to the life cycle costs of certain elements of the facility and equipment, different parameters that can provide a quick response regarding the cost of any changes to the facility in terms of upgrading, adaptation or change of purpose of the facility or part thereof and finally, the parameters of the elements that will signal incoming regular construction work on the maintenance of the facility and the regular replacement of equipment or parts of equipment by the specifications of their manufacturers.

It should be added that it is possible to install different sensors in a facility, which continuously monitor and collect data during the life cycle and the facility exploitation, as well as the equipment built into it, but this requires the participation of machine learning and Internet of Things, for valid data processing, which is a vast topic and I am going to explain that workflow in one of the following articles.

Data That The Digital Twin Can Contain

At the very end, I would like to make a few observations and conclusions about digital twin technologies. The capabilities of modern technologies are increasing, and therefore the benefits that digital tools provide us with data processing, whether generated by human labor, automation tools or machine learning, are increasingly apparent. Essentially, any real-world flaws can be remedied in digital models, including the digital twin model of a building. The advantage of a digital model of a building is that its elements can be assigned much more readily available data than the elements of the building in the real world.

It should be borne in mind that the use of digital maintenance technologies for an existing facility, in addition to better communication between the facility manager and facility users, also improves communication and documentation within the facility management team. The result is transparency in the maintenance work of the constructed facility, as well as significant savings by reducing the number of participants in the process of issuing a ticket, during the intervention itself, and finally documenting the ticket execution for any intervention at the existing facility.

Project Transparency

I hope you found the articles about digital twins interesting ("What Are The Digital Twins?" and "Digital Twins In The Construction Industry"). With this article, I would also conclude a series of articles on digital twin technology and announce the following text "What Is BEP And What Should It Contain".

I would also like to announce a webinar on digital twin technology, which you will be notified in a timely manner.

If you have any questions, comments, or want to know more about the topic I covered in "Data Management In The Digital Twin Of The Building", please contact TeamCAD, who will be happy to provide you with additional information.

Also, if you need any help in designing the process of how to get a digital twin model, or you need to create a digital twin model yourself, TeamCAD will be happy to support you.

Until next time,
Predrag Jovanović

 

::

Previous articles on the similar topic:

 

"Digital Twins In The Construction Industry" 

"What Are The Digital Twins?"

"Small But Big Savings in The BIM Workflow - Examples" 

"BIM Workflow Automation"

"Advanced BIM data management" 

 


Page 1 of 11

© 2020 TeamCAD d.o.o. All rights are reserved.

Welcome to www.teamcad.rs! This website uses cookies. By continuing using this website, you agree to our use of cookies. More details