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4D Scheduling- Types of the 4D Schedule Models

4D Scheduling- Types of the 4D Schedule Models

4D Schedule Models

You might have heard the terms “4D Schedule Models”, “4D Scheduling”, “4D BIM”, “4D BIM Modelling”, “4D Simulation”, and “4D BIM Planning.”

For simplicity, let’s refer to these terms as “4D Scheduling”.

But, what do we mean by “4D Scheduling”?

 

What is 4D Scheduling?

4D Scheduling is simulating the planning sequence of construction activities and space requirements on a 3D model.

4D adds the time factor of the construction schedule to the 3D model.

In simple terms, 4D scheduling is the “visualization of the construction schedule.” [2] That’s it!

To further explore how 4D Scheduling differs from traditional scheduling, please check this post. 

4D Scheduling

 

Types of the 4D Schedule Models

 

1-  Standalone 4D Schedule Models

The first type of the 4D Schedule Models is the “standalone 4D schedule model.”

In this model, there is one 3D model and one schedule. When you link each task in the schedule with the corresponding element in the 3D model, you’ll have a single standalone 4D schedule model.

 

Standalone 4D Schedule Models [1] Standalone 4D Schedule Models [1]

2-  Comparative 4D Schedule Models

Another type of the 4D Schedule Models is the “Comparative 4D Schedule Models.”

Comparative 4D models allow the project team to simultaneously review multiple yet related 4D models and visualize multiple scenarios.

For example, a comparative 4D schedule model could be a scenario that allows the user to perform a visual comparison of a single 3D model and two schedules. This scenario uses one 3D model that is linked to two schedules.

 

Comparative 4D Schedule Models

Comparative 4D Schedule Models- Scenario #1: (One 3D Model and 2 Schedules) [1]

 

An example of this comparative 4D schedule model would be visually comparing the “baseline schedule” with the “updated schedule.”

This type of comparative 4D model is also used in schedule delay analysis that involves the comparison of schedules, such as an as-planned schedule versus an as-built schedule.

Another scenario for the Comparative 4D Schedule Models is the visual comparison of two 3D models and their corresponding schedules.

 

Comparative 4D Schedule Models

Comparative 4D Schedule Models- Scenario #2: (Two 3D Models and 2 Schedules) [1]

 

This type of comparative 4D model is well suited for performing “what-if” schedule comparisons, especially when you experience some potential scope growth or design changes.

Similar to the first scenario, this scenario is beneficial for use in schedule delay analyses that involve the comparison of schedules, such as an unimpacted schedule versus an impacted schedule.

To get more information on the 4D Schedule Models, check the video below presented by Tamer Elgohari at the 2020 Project Control Summit.

 

Note: This video is a sneak peek of the presentation on 4D Planning integration with new technologies”, presented by Tamer Elgohariat at the 2020 Project Control Summit

To get access to the full presentation and other recordings of the Project Control Summit, please click here.

 

In Summary:

4D scheduling is the “visualization of the construction schedule”, which is achieved by linking a 3D digital model with time or schedule-related information.

The visualization of the 4D schedule models can take various forms, depending on whether you are comparing one or more related 4D models and schedules.

 

Resources:

About the Editor, Shohreh Ghorbani

Shohreh Ghorbani is an internationally recognized program developer and instructor in the field of Project Controls. As the founder and technical director of Project Control Academy, the leading provider of online training programs in Project Controls, Shohreh has served tens of thousands of professionals to take their project controls skills to the next level.

With her impressive track record in teaching and years of hands-on experience in a wide range of project control technical areas in various industries, clients have acknowledged Shohreh as a passionate trainer who transfers the knowledge of project controls in a simple and understandable manner.

Shohreh is a licensed project management professional (PMP) recognized by the Project Management Institute (PMI) and a professional member of the Association for Advancement of Cost Engineering (AACE International). Toastmasters International certified her as “Advanced Communicator Silver”. She holds a Master of Science in Industrial Engineering.

Meet Shohreh at Project Control Academy or connect with her on LinkedIn.

About the Presenter, Tamer Elgohari

Tamer is a senior Virtual Design and Construction (VDC) Engineer with more than 9 years of practical experience in construction management, innovation, BIM , and construction visualization.  

He is specialized in 4D/ 5D simulation, construction project management solutions, integrated reporting systems, and innovation management.  

Currently, he is working as the VDC and innovation manager for Analytica Management Solution, an integrated construction group that is best known for delivering turnkey special projects in the UAE. 

He was responsible for the Virtual Design and Construction (VDC) implementation in various projects and locations including UAE, Egypt, GCC, and North Africa. 

Tamer is the 4D BIM section editor for BIM Arabia Magazine. He also has many publications in the field of 4D BIM and presented at many digital construction conferences around the world.  

Learn more about Tamer or connect with him via his LinkedIn profile.

 

 

 

 

 

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