Introduction to BIM and parametric modelling

Question 1

What actually is Building Information Modelling?

Answer 1

The use of a shared digital representation of a built asset to facilitate design and construction to occur on a reliable basis.

Question 2

What are some of the reasons we use BIM?

Answer 2

-Less information loss
-Better communication
-Traditionally information is not available
-Changes are costly

Question 3

Who contributes to the infomation model?

Answer 3

Design team, client, facilities manager and main contractor

Question 4

What is the life cycle process of BIM?

Answer 4

Conceptual design to detailed design to operation to rebuild

Question 5

Graphical data makes up BIM, what does this include?

Answer 5

Geometric modelling, what shape volume does a component have?
Does it collide?

Question 6

What non-graphical data makes up an information model?

Answer 6

Semantic modelling, what is the type of the component? What are its material properties?

Question 7

What documents make up the information model?

Answer 7

Specifications, reports, historical record drawings

Question 8

What is BIM the combination of?

Answer 8

Information content, object properties, geomtry, visualisation and functional data

Question 9

What is not a BIM platform?

Answer 9

Models that contain 3D data and no object attributes, models with no support of behaviour.

Models that allow changes to dimensions in one view that are not automatically reflected in other models

Question 10

What are the benefits of BIM to the owner?

Answer 10

Concept, feasibilility and design benefits. Increased building quality and improved collaboration

Question 11

What are the benefits of BIM for design?

Answer 11

Earlier and accurate visualisations of design, automatic low level corrections. Generation fo accurate and consistent 2D drawings,Wh

Question 12

What are the benefits of BIM for design?

Answer 12

Earlier collaboration of multiple design disciplines, easy verifcation, extraction of cost estimates, improvement of energy efficiency and sustainability

Question 13

What are the construction and fabrification benefits of BIM?

Answer 13

Quick reaction to design changes, discovery of errors

Question 14

What are the post construction benefits of BIM?

Answer 14

Improvved commisioning and handover of info.
Bettter management and operation of facilities

Question 15

In parametric design, what does the designer do?

Answer 15

Defines a model class with a set of parameters and relations and rules to control the parameters.

Question 16

What is a ‘class’?

Answer 16

A collection of things that exhibit the same charactersitics and behaviours.

Question 17

What is an instance of class?

Answer 17

An element defined with a specific set of parameters.

Question 18

What do the parameters include?

Answer 18

Distance, angles and rules like ‘attached to’

Question 19

What are the 3 degrees of parametric modelling?

Answer 19

Parametric solid modelling, assembly modelling, topologu-based parametric objects

Question 20

What is parametric solid modelling?

Answer 20

The simplest level, defining the complex shapes or assemblies defined by a few parameters

Question 21

What is parametric assembly modelling?

Answer 21

An assembly of individual parametric objects by calling in instance of the individual parametric object and specificying relations between them.

Question 22

What is topology-based parametric modelling?

Answer 22

Embedded complex intelligance into a parametric model. e.g. rules for distances between columns

Question 23

What is a parameter?

Answer 23

Variable properties of building components.

Question 24

What is a constraint?

Answer 24

The dependancies between geometric elements.

Question 25

What happens when a parameter chnages?

Answer 25

There is an automatic update of dependant parameters.

Question 26

What is a category?

Answer 26

A group of elements that you use to model or document a building design, e.g. columns.

Question 27

What is a family>

Answer 27

Classes of elements, e.g. rectangular or round columns.

Question 28

What is a type?

Answer 28

A specific size of a family, e.g 450mm x 450mm column

Question 29

What is an instance?

Answer 29

Actual items that are placed in the project, e.g. 450mm column, 2m in height.

Question 30

What does each type in a family have?

Answer 30

An identical set of parameters, called family type parameters

Question 31

What do family type parameters cause chnages to?

Answer 31

All the element instance created with that type

Question 32

In order to decide how much data should be exchanged at each stage of the project, what has been developed?

Answer 32

A concept of level of detail

Question 33

What is the objective of LoD?

Answer 33

To help teams get a clear picture, to help design managers explain to their teams the infomation and detail that needs to be provided at various points.

Question 34

What is the AIA LoD 100?

Answer 34

Model elements may be graphically presented in the model with a symbol or other generic representation, but does not satisfy LoD 200

Question 35

What is a LoD 200?

Answer 35

Model element is graphically represented within the model as a generic system, object or assembly with approximate quantities, size, shape, location or orientation.

Question 36

What is LoD 300?

Answer 36

Model element has a specific system, object or assembly in terms of size etc.

Question 37

What is LoD 350?

Answer 37

300 + interfaces with other building systems

Question 38

What is LoD 400?

Answer 38

350 + detailing, fabrication and installation information.

Question 39

What is LoD 500?

Answer 39

Field verified representation in terms of size, shape, location, quantity

Question 40

What is the level of information need?

Answer 40

The specific information defined for each information deliverable according to its purpose

Question 41

What should the level of information need be determined by?

Answer 41

The minimum amount of information needed

Question 42

What does the level of model definintion equal?

Answer 42

Level of detail + level of information

Question 43

What are the differences between the AIA approach and the ISO approach?

Answer 43

AIA is structures such that it provides a definitive set of guidance by defining and lablling LoDs in a more precise way, however there is no link between project or work stages. The approach will be decided by the client.

Question 44

What is the difference between generic object and specific objects in libraries?

Answer 44

Generic objects are used as placeholders, specific object represent a manufacturers specific products

Question 45

Is the construction industry trying to prompt manufacturers to provide high quality BIM objects?

Answer 45

Yes, for use in their projects.