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BIM based process miningEnabling knowledge reassurance and fact-based problem discovery within the AECFM industry
Graduation thesis for Construction Management and Engineering Msc by :Stijn van Schaijk
BIM based process mining , Enabling knowledge reassurance and fact-based problem discovery within the AECFM industry
1
Always the same problems?
Always the same problems in construction industry3
Complexity in the construction sector?
Winch (1987): construction projects are amongst the most complex of all activities.
Gidado (1996): rapid increase in the complexity of construction processes.
Lots of specialists/experts/companies
A construction project team
A new construction project team
Large fragmentation results in
short learning curve
short learning curve
Knowledge loss9
As a result of knowledge lossSame problems over and over
As a result of knowledge lossWastes/spoilings
LEAN
11
As a result of knowledge lossA lot of improvements possible in terms of quality, speed, efficiency and money!
Target of the research:
How?Knowledge reassurance with Building Information Modelling and Process Mining.
Learn from previous projects.Finding bottlenecks and planning deviation.
Develop a method with tools to reuse data from previous projects.
BIM construction industry IT systems data15
What is BIM?
BIM is data16
What is Process Mining?https://www.youtube.com/watch?v=7oat7MatU_U
Process mining research field18
Case studies: Construction process mining
19
Case study: Construction design process mining
Case study: Construction design process mining
Analysis of the design process of a road project
Case study: Construction design process mining
Event log export from Relatics 140.000 events
Planned process of verification a specificationCreate/Import SpecificationConnect Specification to Upper/Lower Specification Assign Specification descriptionAssign control responsibility Assign Specification to Project phase Assign Specification to PersonConnect Specification to Work package activity 1Connect Specification to Work package activity 2Connect Specification to Work package activity 3Create work package (WPA) verificationAssign work package (WPA) verification to PersonAdd document of prove Add note to WPA verification
As-planned:
As-planned:
As-happend:Most extreme result: 1 specification had 1904 process steps
Most extreme result: 1 specification had 1904 process steps
Most extreme result: 1 specification had 1904 process steps
Conclusion case studyProcess mining analytics did us realize that we use our IT systems to store information, but those systems dont automatically facilitate an efficient process.
-Process engineer, contractor
More info? Read http://www.slideshare.net/StijnvanSchaijk/case-study-construction-design-process-mining
Case studies: Construction process mining
Continuous improvement cycle during construction projectsHow: Plan, (Autonomous-) Capture, Analyse and Reuse process data from construction sites
Finding and storing bottlenecks and planning deviation
Case study: Schependomlaan NijmegenPartners:Hendriks Bouw en OntwikkelingDreamfocus DronedRAAMAC
IFC model
Need for tools
PlanConnect planning to IFC Generate As-planned models
CaptureScan construction site with droneCreate As-built point cloud model (Structure from motion)Compare As-built with As-plannedMerge results with event log
1. Scan construction site with drones (Dreamfocus Droned https://www.youtube.com/watch?v=QbBf31bY0xw )
2. Create As-built point cloud modelStructure from motion techniques, how does it work?
Take a lot of images of an object
Around 300 pictures generated from drone movie
Identify points in the images that can possibly be detected in other images
Search for corrseponding points in other images
Compute camera positions and 3D point positions such that corresponding viewing rays intersect(Matlab script)
Result: As-built point cloud
4. Compare As-planned and As-built
Elements missing according to dronescanWeek 26 : 9 missing elements - windows and insulation parts.Week 27 : 50 missing elements - windowsWeek 28 : 89 missing elements - windows, insulation, brick facades, and prefab elements.Week 29 : 18 missing elements - windows, insulation and brick facades.Week 30 : 4 missing elements - windows.
Final event log3661 events tagged On time, or Too late
3. Analyse
Event log analyticsAs-planned vs As-builtDurationsProcess variantsBottlenecksSocial analytics
Analytics concrete floorQuery: Give me all the processes related to the material Breedplaatvloer
Concrete floors
Concrete floors
Social analytics Query: who is most influential on the project?
Social analyticsQuery: Which tasks has Timmerman 1 done at this project?
4. Reuse Tool: Planning consult with BIMserver
4. Reuse
Planning consult
Risk visualization
Planning advice and risk identification
Case study recap
Results & discussionFound reuse applications for as-planned BIMsAdvice: As-planned models contain valuable data, reuse them
Results & discussionUsed state of the art for process capturing.Advice: Allign planning and capturing tools.
Results & discussionBridged gap process mining and BIM
Results & discussionDiscovered potentials process mining in construction industry.
Read case study design process mininghttp://www.slideshare.net/StijnvanSchaijk/case-study-construction-design-process-mining Read case study facility management process mining:http://www.slideshare.net/StijnvanSchaijk/case-study-process-mining-with-facility-management-data
Further workProject level
Further workCompany level(Process oriented data warehouse)
Further workIndustry level
Further workReuse facility management data for new projectsIdentify risks in very early stages
Further workMore alignment between physical and digital world, so more data.Real time data reuse so failures can be predicted
You can reuse: Dataset:http://bit.do/DataSetSchependomlaan
ToolsEventlog generator: https://www.youtube.com/watch?v=LOJsHvGq-KE Planning consult: https://www.youtube.com/watch?v=nJTh_0Xmra0
Thesis http://www.slideshare.net/StijnvanSchaijk/building-information-model-bim-based-process-mining
Thanks to all who have helped
Questions?
Dreamfocus Droned