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CE114/214Theory: Models

functions, forms, and behaviors of

organizations, processes, and products

Practice Models for AECconstruct and interrelate to maximize project value.

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Todays Agenda- Introductions- Models social, physical, graphical, SymbolicRepresentation (objects, attributes, relationships)

Reasoning

- Models for AECfunctions, forms, and behaviors of

organizations, processes, and products

– In Class Exercise– Overview of Class– +/

Introductions

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First AssignmentStanford will host intensive multinational design charettes to address growing crises around the world. They need an iRoom in the Stanford Quad to enable close proximity to the dignitary quarters which will be in the surrounding buildings.

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Decisions

…

Assignment: Design, Fabricate, and Erect the iRoom Due: October 15, 2009

…

Just Kidding, but….

How would you gather and organize all of the people, tasks, information, materials, decisions, quickly enough to get this done?

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Graphic product models+: Clear to viewer

: computer support ...?– List components– Assess stability– Estimate energy– Estimate cost– Plan construction– Identify interferences

….

School-building.png

Rectangle 1, Rectangle 2, Rectangle 3

Product Model

Models

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Representation

• Objects named entities with:

• Attributes• Relationships

– To other objects– Constraints on attributes & relationships – Constraints on behaviors

• MethodsTo set/read OAR, and to encapsulate behavior

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Representation: Schema

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Representation: Instance

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What is Model-Based Reasoning

Analysis of SystemUse compiled heuristics, mathematics, statistics, sometimes combined with human reasoning

Examples: analyze building model to:– List components– Estimate cost– Simulate energy consumption– Plan construction– Identify construction interferences

Performance Model

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Reasoning

Symbolic model of internal processing (Transparent Box)

Specialized heuristics

(Expert Systems)

Mathematical/statistical (Black Box)

InputModels

OutputModels

Models for AEC Projects

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•Functions / ObjectivesDesired Behavior of the POP

•Forms / AlternativesFor the POP

•Behavior / PerformancePredicted or measured for the POP

•ProcessesThe work to be done

•Organizations The people involved the work

•Products The results of the work

Models for AEC Projects covered in this class

• Project (POP) Models• Organization Models• Life Cycle Assessment Models• Architectural Product Models• Energy Models• Structural Models• Process Performance• Decision Models• Integration Models

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Project (POP) Models

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Organization Models

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Life Cycle Assesment Models

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Product Models

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Structural Models

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Energy Models

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Design Process Models

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Arup: 130676-Stanford GSB/Library

Process Integration Platform

Construction Process Models

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Integration/Optimization Models

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Decision Models

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Why Model?: Increase Value

Value adding• Identifying

objectives• Generating best

design• Install column• Validate

performance

Non-value adding• Look for CAD

drawing• Wait for delivery • Move part to

machine• Prepare a bill

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In-class exercise• Develop an “instance” symbolic model that allows

a contractor to identify elements and their costs.

iRoom Product Model

Elements

Walls

iRoom CostsTypical Costs

Walls

Painted CMU•Cost / Unit $60•Units Linear Feet

Windows

Wall 1• linear feet = 10’•Wall type = painted cmu

Cost Item 1•Product Model Item = Wall 1•Construction = Painted CMU•Cost = $600

Cost Items

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Course Objectives

• Understand fundamentals of modeling• Understand state of the art AEC modeling tools• Develop novice skills using these modeling tools• Relate models to business objectives and limits • Learn problem-solving skills• Learn to communicate effectively• Extend your thinking about engineering

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Organization

Course URL: http://www.stanford.edu/class/cee214/

Readings – Introduce modeling concepts

Lectures – Reinforce modeling concepts

Labs – Reinforce basic modeling concepts

Queries – Test comprehension of basic concepts

Evaluation: Queries + (a little) discretion

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Agendahttp://www.stanford.edu/class/cee214/Agenda.htm

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Lab

Practice building simple models.

2 hours in class, perhaps another hour or two after class

Assume you know how to use basic windows applications and user operations.

Lab Use

• Students use SUNET ID and password

• Follow all Lab Rules- Clean up after yourselves, turn off lights

• Limited after hours access to iroom– keys

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Queries/ Evaluation

Coursework.stanford.edu

Weekly queries on readings, lectures, and lab.

Queries 1 thru 9 10 pts each

Attendance & Participation 10 points

Total Points 100 points

Wednesday

• Readings on website

• Fundamental Modeling Concepts– Model scope and boundaries– Objects– Attributes– Relationships– Schema and Instance– Reasoning

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Query 1: Next MondayChoose a Project Site

We learn about AEC models by building them for a specific problem partially of your own design.

An “iroom” to be placed within a context of your choosing, for a client of your choosing.

There is no advantage to being elaborate with the selection of site and the point is to give you enough context to inform the models you build.

Create a link to a google map of the site of your choice.

Write

• Write a project brief. Who wants the project, what are their goals, who else is impacted? What are the constraints?

• You will build several models related to this project, so this context is useful for defining the model contents.

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Query 1: Next Monday

• Follow the 10 steps outlined in INTRODUCTION TO MODELING AND SIMULATION

Anu Maria

Use approximately the same level of detail to describe one of the models I have previewed today (or describing a different model is ok too).

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Build a model analysis

Speculations about Model-based Integrated Engineering

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