Verifying the completeness of Building Information ModelsEnhancing control over BIM development processes

September 28, 2016Eindhoven

FINAL PRESENTATION MASTER THESIS CONSTRUCTION MANAGEMENT AND ENGINEERING

Graduate studentJ. J. W. (Jesse) Weerink

Graduation committeeChairman: Prof. dr. ir. B. (Bauke) de VriesGraduation supervisor: Assistant prof. dr. dipl-ing. J. (Jakob) BeetzGraduation supervisor: Doctoral candidate C. (Chi) ZhangExternal supervisor: Ing. Y. (Yves) Scholtes

What is BIM?

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source: Van Schaijk, 2016 source: Van Schaijk, 2016

Like a car, a BIM consists of many objects

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Each object has to satisfy specific requirements.

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42 Requirements

How to check if the BIM satisfies all requirements?

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Example BIM93 doors 42 exchange requirements 3906 checks

Manual vs Model Checking Software

Model checking software is as fast, user-friendly and reliable as a BMW.

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A model checker extracts issues from the BIM using a ruleset

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BIM Ruleset Issues

Before issues can be extracted, a ruleset shoud be developed

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BIM Ruleset Issues

Develop ruleset in model checker

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A model checker processes BIMs

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BIM Ruleset Issues

Analyze issues

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Problem solved?

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source: Laakso et al., 2012

MvdXML Checker

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source: Laakso et al., 2012

Zhang et al. (2014): Developed the mvdXML checker, which is a non-proprietary model view checker based on open standards to validate IFC building models.

MvdXML Checker verifies BIMs similar to proprietary model checkers.

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BIMIFC

RulesetmvdXML

IssuesBCF

The mvdXML Checker uses a mvdXML ruleset to filter the IFC building model.

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BIMIFC

RulesetmvdXML

IssuesBCF

Creating mvdXML ruleset

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Exchange requirements IfcDoc tool mvdXML

The IfcDoc tool navigates and extracts elements from the IFC Schema

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The extracted data results in a hiërharchy tree which can be converted to a mvdXML filter

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In order to use IfcDoc, knowledge is required about:

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IFC Schema mvdXML IfcDoc tool

IfcDoc is complex for domain end-users

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IFC Schema mvdXML IfcDoc tool

This graduation project foccusses on making the mvdMXL Checker more user friendly

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source: seophilippinesinc., 2016

Simplify the generation of mvdXML rulesets

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Requirements IFC doc mvdXML

Requirements mvdXML generator mvdXML

The NATSPEC Object/Element matrix supports the specification of requirements per object, during the development process of a BIM.

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source: Natspec Object/Element Matrix, 2011

Specifiy applicable object

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source: Natspec Object/Element Matrix, 2011

Distinguish phases according to LOD concept

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source: Natspec Object/Element Matrix, 2011

Visualization LOD concept

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source: Natspec Object/Element Matrix, 2011

source: Lanmar services, 2014

Specification and classification of rules

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source: Natspec Object/Element Matrix, 2011

Specify which rules are required in phase LOD 100

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source: Natspec Object/Element Matrix, 2011

The IFC Support concept is not applied to create rulesets yet

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source: Natspec Object/Element Matrix, 2011

Develop a template to specify object requirements and a syntax to convert requirements to mvdXML rules

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Requirements mvdXML generator mvdXML

The following template is developed

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The applicable object is a door at LOD 200

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Property and quantity rule types

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Specify which rules are required

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The specification for the mvdXML ruleset

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The IFC Support strings contains the following elements:

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IfcDoor

IfcObjectIsDefinedByIfcRelDefinesByPropertiesRelatingPropertyDefinition

SelfClosing -> =

IfcPropertySetHasPropertiesIfcPropertySingleValueName

Applicable Entity Requirement Operator

Template Elements

Template Elements are used to create a ConceptTemplate

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IfcObjectIsDefinedByIfcRelDefinesByPropertiesRelatingPropertyDefinition

IfcPropertySetHasPropertiesIfcPropertySingleValueName

This template specifies that an object should contain a property

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IfcObject IfcPropertySingleValue

The Concept specifies which object and property is required.

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IfcDoor SelfClosing

However, it remains complex to extract the correct Template Elements

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IfcObject.IsDefinedBy.IfcRelDefinesByProperties.RelatingPropertyDefinition.IfcPropertySet.HasProperties.IfcPropertySingleValue.Name

Therefore, shortcuts are developed for often used rules

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The IFC Support shortcut string is parsed into the elements

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IfcDoor SelfClosing -> =

IfcPropertySingleValueName

Applicable Entity Requirement Operator

Template Elements

Template Elements are used to select a predefined ConceptTemplate

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IfcPropertySingleValueName

The associated rule is generated by adjusting a predefined concept

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IfcDoor SelfClosing

The developed syntax and template simplify the development of mvdXML rulesets

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BIMIFC

RulesetmvdXML

IssuesBCF

Note that the mvdXML Generator develops mvdXML filters that verify the existence of parameters

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In addition, it is difficult to operate the mvdXML checker

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Therefore an user-interface is developed

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The user-interface can generate mvdXML rulesets

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The user-interface can operate the mvdXML checker

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Simplify operating the mvdXML checker

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The mvdXML checker is more user-friendly

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source: seophilippinesinc., 2016

The application is demonstrated in a short movie

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Summary – Before study

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IFC Schema mvdXMLIfcDoc tool

Difficult to operate Complex

Summary – After study

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Template/Syntax

User friendlyEasy to operate

User Interface mvdXML

Conclusion

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Future work - The mvdXML generator should be automated further by adding shortcuts

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Future work - Generate rules that validate parameter values

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Future work - The mvdXML Checker should be based on IFC4

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Future work - Automatic viewpoint generation and classification of issues

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CLOSURE

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Thank you for your attention!

Questions?