A few days back I had given this presentation to CAD professionals transitioning from CAD to BIM practices.

1. The Transition from CAD to BIMby Shadaab SAYYED
It's not just drawing some shapes but solving some really big problems

2. What is BIM?
“Allow Me to Explain it with the definition”
#TechnicalTermsMatter

3. BIM – DEFINITION
Generic term used to describe advanced 3D CAD technology for
modeling and managing buildings and information related to them. BIM
models are differentiated from traditional CAD systems in that the
software objects in a BIM model are intelligible to computer programs
as representations of real-world building components, unlike the
graphic objects in a two-dimensional CAD file” (sacks et al, 2005).
The American institute of architects (aia) defines BIM as “a model-
based technology linked with a database of project information”. BIM
covers geometry, spatial relationships, geographic information,
quantities and properties of building components.

4. Practical BIM
It is basically a system/method wherein your typical so call dumb
3D models/drawings become intelligent enough to facilitate a lot
of functionalities.
These functionalities could be clash detection, collaboration,
quantity estimation, energy analysis, et cetera.

5. What Exactly have we been doing up until now?
The Traditional CAD practice
• It was drawing geometries based on understanding &
calculations.
• It was basically 2D drawings or 3D models that represented a
general idea of geometry, connections or handing instructions.
• The modeling did not carry any intrinsic value or information, it
was just spatial information packaged in the form of drawing or
model.

6. What has changed? Behold!
The BIM practice
• Every line/dot on the model/drawing has some value coded into the software.
• A wall is no longer just a line on a paper but it is a proper wall with all properties of a
wall and drawn as a wall that will actually represent a real wall from the site.
• A dot is not just a dot on the paper but it supposed to have complete information
of what exactly it is. It could be a control station on the site, it could be temporary
bench-mark, it could be something else but it has to have some value associated
with it.
• A fixture is not just a dumb block or 2D model but an intelligent object that can
allow programs to calculate its quantities and effects on the entire structure.

7. But Why?
Drawings were sufficient right? Or Not?
• BIM can be implemented because now we have the
computational power to process the information and graphical
visualization.
• Complexities in projects require advanced methods to
implemented.
• “Automation is on the rise and computers don’t understand
humans that well  Basically, we’re spoon feeding data at the
moment”

8. How exactly does that work?
Model
Approval
Procurement
Production
Deployment

9. Model
The real Agony
• This is the part where based on the inputs a model is prepared.
• But this isn’t just some 3D modeling! Its not just some 3D model you prepare in
AutoCAD or SketchUp.
• In BIM, it is where the entire formulation is done. It is exactly how the building is to
be built. What materials are to be used and where they have to be placed and how
they have to be placed. Everything is to be planned & modeled in this phase. Most
BIM projects 6D maybe implement time as a component as well wherein they
actually simulate the production cycle and the life of the structure.
“Actually it Sounds interesting but is very boring to actually model stuff.”

10. Just a little understanding of how these models are different.
“A line or 3D geometry just has geometric
properties. It is the attributes/layer that add values
to the modeling information that is being modeled.”
So before you draw lines/explode objects just be cautious you might be messing up with the
information in the back end. What’s worse than not having a model is having a bad model.
Be cautious while mirroring objects might also affect in someways.
Still need more information on this though!

11. How does this model benefits?
Yes Pain Yes Gain
• When you prepare the model it creates data points in the back –end that
could drive systems that help in performing analysis such as Energy
Analysis, Structural & Dynamic Response, Men & Material
Deployment Strategies, Transportation Planning, et cetera.
• While preparing the model itself a lot of problems are addressed
such as
• You find clashes
• You find imperfections in the structure
• Other stuff.

12. You contribute a lot!
• Construction projects are a costly affair, yet more costly if you
have to repair or rework stuff.
• But this cost and rework can be avoided by properly simulating
everything in the model.
• An example could be reinforcement modeling.

13. You contribute a lot!
Reinforcement Modeling.
• While modeling you put in the exact size that is required and fix up all the
clashes the could occur in the product. Poka – Yoke
• The sizing and geometries can be directly produced by feeding the
information to the CNC machines. Muda
• The crew on the site have a clear idea of where to put what and don’t need
to interpolate parts or try to figure a way how to put this in the model. Muri
• As everything is pre-assembled i.e. simulated in the software it should
exactly fit in the right places. “The assembly line will be free and flowing as
Toyoda had”

14. Just think of it….
How difficult it is…. How easy it is…..
To fix clashes when the product is on site. It’ll be
really hot or cold or even at some odd/hazardous positions
To fix the clashes in a software before it is
produced. It is much easy when you have a comfortable
position to sit and a controlled air conditioning system.
There might be some headache & back-ach but we can
certainly overcome this by some exercise & coffee!
To have everything on the assembly line but you
get stuck up with where to put stuff? You need
to make last minute calculations & adjustments.
Everything is already taken care of, just put the
stuff as it comes. You can go home early & enjoy
stuff. This is for people on site 
To prepare everything putting all the men,
material & money just to realize it was all
incorrect.
To virtually simulate everything before you
actually waste anything….
Just because a model is correct the assembly line can run
efficiently giving out more production and minimum errors…..

15. Benefits!
I don’t think I need anything on this slide……

16. So its not just some modeling……
• Its about saving the world :-)….
• Yeah really,
• Saving material
• Men
• Resources
You’re a superhero!

17. End of Presentation

18. MADE BY:
SAYYED SHADAAB
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