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BIM%2B+180511 - Introduction to Product Management through...

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Unformatted text preview: Introduction to Product Management through BIM Introduction to Product Management through BIM Center for Integrated Facility Engineering (c) 2010 1 Introduction to Product Management through BIM Virtual Design and Construction (VDC) Client/Business Objectives Project Objectives BIM+ ICE Process Design Current State Process, T5 Rebar Detailing for Construction NOTE: Design changes during detailing (from: architecture, baggage, systems, etc.) are upsetting RC drawing development. Design input/ changes Update spec Engineering Refine RC details and concept for buildability/ detailing Prepare RC detail drawings (drafting) Detailed engineering design information Building control check & sign off (BAA, time?) Release paper P4 dwgs & bar bending schedules Consists of: engineering calculations, sketches, etc. NOTE: Drawings are batched into sectionsthen subdivided into building components. Each component is an assembly package, e.g. rail box floor, wall, etc. Check against engineering calcs (.5d /dwg) Independent final check & sign off (2 weeks) Preliminary RC detailing GA drawings Release spec CAD check (1d/dwg) Draft spec Preliminary design The number of drawing sheets per building component vary depending on the work. On ART for example, each component may consist of 8-15 GA drawings and 8-15 RC detail drawings. Iterative process Most of the checking process is done concurrently with RC detail development. BAA building control accepts the opinion of the independent design check - and does not perform a check of its own Document control delay (1 week) Release CAD dwg, rebar schedule (*.CSF) in Documentum Manufacture All of the GA drawings are complete pending changes from other design disciplines Rebar factory starts bending Assembly Use model to develop and communicate methods Center for Integrated Facility Engineering Comment on spec Pre-assembly Model rebar component (Use digital Prototyping tool) Back drafting 1 week Preliminary drafting 2 weeks Timeline: Technology: Check and coordinate detail drawings AutoCAD CAD RC IDEAS Arma + Other / None/ Unknown Ship to site Checking 2 weeks Issue and resolve TQ’s (Technical Queries) Document control 1 week Existing Process - 6 weeks Site assembly Introduction to Product Management through BIM Past Present Future • Yesterday’s practice: YCASWYG You can’t always see what you get • Today’s practice: WYSIWYG What you see is what you get • Next practice: WYMIWYG } What you model is what you get performance Center for Integrated Facility Engineering Scofield 2002 Introduction to Product Management through BIM 3 Levels of BIM 1. Visualization (manual integration) • • • • Model and visualize all “expensive” elements of the product, organization, and process Get input from team members and stakeholders when it matters Incrementally enhance project objectives Pay for with project funds 2. Integration (computer based) • Building information models “interoperate” between disciplines and connect to other data sets (cost estimates, schedules, etc.) • Single data entry • Requires corporate, multi-project support 3. Automation • • • • Automated design and (CNC) manufacturing Do high-quality work really fast all the time Enables breakthrough project performance Requires corporate, multi-project support Center for Integrated Facility Engineering 4 Introduction to Product Management through BIM There are many types of BIM • 3D geometry • 3D information • 3D component information (non-geometric attributes) • 3D+ – Time 4D – Cost – Sun exposure – Etc. Center for Integrated Facility Engineering Introduction to Product Management through BIM There are also many applications of BIM • 3D geometry Visual checks Rapid communication Same page Engagement of non-AEC stakeholders • 3D information Clash detection Coordination Generation of 2D drawings Generation of 3D information • 3D component information (non-geometric attributes) Quantity takeoff • 3D+ Analysis Center for Integrated Facility Engineering Introduction to Product Management through BIM And there are many types of 3D+ authoring and review tools • 3D geometry modelers • BIM tools • Parametric modeling tools • 3D+ tools – 4D modeling – 5D tools – BIM-based analysis tools • BIM review tools • Since these tools are created by people some of them “talk” to each other better than others Center for Integrated Facility Engineering Introduction to Product Management through BIM Productive use of BIM depends on • Identifying the tasks BIM should support including the criteria for productive and successful completion of the task • Defining the type of BIM needed for a task • Defining the structure, content, and format of the BIM • Selecting the right people to create and review the BIM • Setting up the workflow to leverage BIM • Selecting the appropriate BIM creation and review tools Center for Integrated Facility Engineering Introduction to Product Management through BIM Buildings Leak at the Intersection of Contracts Roofing Wall stud Caulking Window Masonry Waterproofing Concrete Structural steel Foundation Excavation Center for Integrated Facility Engineering Slide by Todd Zabelle Daylight Analysis Percentage of available global insolation on horizontal surface Natural Terrain Hazard Study – QRA Spatial Data API, DTM, Geology map etc.. Visual Quality Result in 3D Model Percentage of Sea View and Mountain View Site 3A Site 2 Site 1 Site 2 Site 3A Site 3B Sea 13% 36% 49% 27% Peak 44% 60% 46% 41% Both 0% 4% 6% 6% None 43% 7% 11% 38% Site 3B Visual Quality NA <1 1 to 2 2 to 5 5 to 10 10 to 20 > 20 % of Resident 33% 16% 24% 15% 7% 6% Site 1 Visual Quality Score from Surrounding toward Site Visual Quality Before Development 1.14% After Development 0.82% Introduction to Product Management through BIM Design review by users with a geometry 3D model Center for Integrated Facility Engineering Image Courtesy Walt Disney Imagineering Introduction to Product Management through BIM Coordination of systems in 3D with a 3D model Image Courtesy DPR Courtesy DPR Center for Integrated Facility Engineering Slide Content Courtesy Optima Introduction to Product Management through BIM Model-based Quantities and Schedule Courtesy Optima Center for Integrated Facility Engineering Introduction to Product Management through BIM Revit - QTO Center for Integrated Facility Engineering Introduction to Product Management through BIM Inventor - QTO Center for Integrated Facility Engineering Introduction to Product Management through BIM Every feature is modeled and taken off! Center for Integrated Facility Engineering Introduction to Product Management through BIM Study life cycle performance Center for Integrated Facility Engineering Example courtesy Optim Introduction to Product Management through BIM Minimize water use by selecting the right plants Example courtesy Optima Define plant zones on terraces Center for Integrated Facility Engineering Introduction to Product Management through BIM When selecting the heating/cooling strategy during conceptual design, consider operations performance operations cost installation costs displacement cooling Center for Integrated Facility Engineering mixed cooling Snapshots courtesy of Granlund, Helsinki, Finland 3D BIM to calculate energy performance Comfort simulation of the spaces Energy simulation of the building CFD simulation of demanding spaces Environmental analysis (LCA) Investment and LCC analysis Building modelling - if not architect model available Building product model FM and building portals IFC DWG Self-reporting building Architect CAD design Space data input and viewing Virtual reality Lightning visualization Visualization of combined models Building services 3D CAD Bills of quantities Copyright Granlund | | www.granlund.fi BIM-based Scope, Cost, Schedule Management Estimating at Different Levels of Detail Project Level Footprint: 441sf Unit cost: $249.64/sf System Level Weight of steel: 18,320 lb Unit cost: $1.43/lb Production rate: 643 lb/hr Unit Level Beam ID: B1 Volume: 0.124 cu ft Total surface area: 7.216 sf Unit cost: $177.10/ea Production Rate: .2 hrs/piece (or 5 pieces/hr) Center for Integrated Facility Engineering Example courtesy Optima BIM-based Scope, Cost, Schedule Management Matching Scope-Cost-Schedule Information Unit Costs Center for Integrated Facility Engineering Production Rates BIM-based Scope, Cost, Schedule Management BIM-based Scope-Cost-Schedule Methods Automated Steps • • • • Visualization Quantity take-off Basic math and reports Project & activity duration Manual Steps • Assigning building objects to cost and production items Schedule • Creating activities • Setting activity precedence • Assigning building objects to Center for Integrated Facility Engineering activities BIM-based Scope, Cost, Schedule Management Virtual Scope Objects, such as walls, automatically define properties used for cost estimation and scheduling BIM authoring programs can export objects and their properties to estimating programs Center for Integrated Facility Engineering BIM-based Scope, Cost, Schedule Management Cost and Production Databases Databases are manually populated with unit costs and production rates in the form of assemblies Objects are assigned manually to assemblies Costs and assembly durations are tabulated automatically for all linked objects – Generally software will export reports to Excel Center for Integrated Facility Engineering BIM-based Scope, Cost, Schedule Management Detailed Scheduling Activity durations are imported into populated schedules – usually through Excel copy-paste. Schedules can be semiautomatically linked to BIMs to create 4D simulations, which can serve a variety of purposes. Center for Integrated Facility Engineering Integrated Multidimensional Virtual Building Ta r g e t C o s t i n g Design/Construction model – Model Progression Specification → LOD 100 Conceptual → LOD 200 Generic Placeholders → LOD 300 Specific Assemblies → LOD 400 Details 30 Ta r g e t C o s t i n g Design/Construction model – Model Progression Specification 31 BIM-based Scope, Cost, Schedule Management BIM: Scope-Cost-Schedule Models Pros Cons • Automated quantity take-off saves hours • Detailed cost estimating and scheduling iterations are quicker • Software provides enhanced visual representations of project plan • Digital information entered once is reused many times • Not all objects define quantities automatically • First iteration takes many hours for manual data entry and linking • Level of detail mismatches are common-place • High burden on quality control of BIM Center for Integrated Facility Engineering Introduction to Product Management through BIM Recommendations for BIM use • • • • Use a PBS (a clear “shopping list”) …. and a WBS Sooner or later you pay for integration Don’t use a single criterion or metric, although using a single criterion is a good method to show what’s possible • Good data how do you know? – Integration, visualization, clear units, … ($/sf is not a clear unit! What cost, what sf?) • Make work and information flows clear • Most tools in project management document information, they are not built to optimize and compare • Build a mental model first, trust your intuition, confirm and adjust it with the “software” model • Be clear about the purpose of the models you create Center for Integrated Facility Engineering ...
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This note was uploaded on 10/03/2011 for the course CEE 100 taught by Professor Fischer during the Spring '11 term at Stanford.

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