© 2012 Autodesk Discrete Event Simulation Case Study using Autodesk Navisworks Module 1: What is Discrete Event Simulation? Jonghoon “Walter” Kim, PhD Senior BIM Project Manager, DPR Construction

© 2012 Autodesk LEARNING OBJECTIVES At the end of this class, you will be able to:  Learn what discrete event simulation is and how it’s applied in various industries  Find out what construction processes can benefit from discrete event simulation  Figure out how to use Autodesk Navisworks to link Clash Detection with Timeliner  Describe practical examples of using this process on the University of Virginia Old Jordan Hall Mechanical Upgrade project

© 2012 Autodesk Module Summary This module describes what discrete event simulation (DES) is. It shows the basic concept of discrete event simulation, components of discrete event simulation, results of discrete event simulation, and applications of discrete event simulation in various industries.

© 2012 Autodesk DISCRETE EVENT SIMULATION  A system with chronological sequence of events Customer Queue A system with a sequence of events

© 2012 Autodesk DISCRETE EVENT SIMULATION  A system with a chronological sequence of events  Each event at a time (hence discrete) Event #1: Customer #1 left

© 2012 Autodesk DISCRETE EVENT SIMULATION  A system with chronological sequence of events  Each event at a time Event #3: Customer #3 left

© 2012 Autodesk DISCRETE EVENT SIMULATION  A system with chronological sequence of events  Each event at a time  The event changes state of the system Event #3: Customer #2 left

© 2012 Autodesk DISCRETE EVENT SIMULATION  A system with chronological sequence of events  Each event at a time  The event changes state of the system  Discrete event simulation is a process of codifying the behavior of the system Event #4: Customer #5 arrived

© 2012 Autodesk Discrete Event Simulation  Queue of events  Time at which the event occurs  State changes  The system states which are changed by these events  Number-of-Customers-in-the-Waiting Line  Teller-Status (busy or idle)

© 2012 Autodesk Discrete Event Simulation Clock Time 12:30 PM 12:40 PM 12:45 PM 12:50 PM Event - Customer #1 left Customer #3 left 12:35 PM Customer #2 left Customer #5 arrived Number of Customers in Waiting Line Teller #1Teller #2 Teller #3 Busy Idle Busy Idle Busy Idle Busy Idle

© 2012 Autodesk STATISTICS  The simulation typically keeps track of the system's statistics, which quantify the aspects of interest. In the bank example, it is of interest to track the mean waiting times  DES determines the number of tellers required to serve customers

© 2012 Autodesk APPLICATION AREAS  Simulation in service industries  Airport luggage handling  Hospital processes  Manufacturing (batch and process)  Personal computer assembly lines How about the Construction Industry? Check out the next Module

© 2012 Autodesk NEXT STEPS Modules in this class:  Module 1: What is Discrete Event Simulation (DES)?  Module 2: Construction Processes Which Can Benefit from Discrete Event Simulation  Module 3: Autodesk Navisworks to Link Clash Detection with Timeliner  Module 4: 4D Clash Detection on the University of Virginia Old Jordan Hall Mechanical Upgrade Project

© 2012 Autodesk Autodesk, AutoCAD* [*if/when mentioned in the pertinent material, followed by an alphabetical list of all other trademarks mentioned in the material] are registered trademarks or trademarks of Autodesk, Inc., and/or its subsidiaries and/or affiliates in the USA and/or other countries. All other brand names, product names, or trademarks belong to their respective holders. Autodesk reserves the right to alter product and services offerings, and specifications and pricing at any time without notice, and is not responsible for typographical or graphical errors that may appear in this document. © 2012 Autodesk, Inc. All rights reserved.

© 2012 Autodesk Discrete Event Simulation Case Study using Autodesk Navisworks Module 2: Construction Processes Which Can Benefit from Discrete Event Simulation Jonghoon “Walter” Kim, PhD Senior BIM Project Manager, DPR Construction

© 2012 Autodesk MODULE SUMMARY This module examines construction processes which can benefit from discrete event simulation (DES). It introduces a case on construction-related production planning using DES. The second case shows an example which uses discrete DES to detect time-space conflicts during MEP system installation.

© 2012 Autodesk Activity #3 DES IN CONSTRUCTION Planning of Construction Related Production System Queue of Events Activity #1 Activity #2 Construction Site Day 0

© 2012 Autodesk Activity #3 DES IN CONSTRUCTION Planning of Construction-Related Production System Queue of Events Activity #1 Activity #2 Construction Site Day 1 Quantity of work Number of workers Production rate New Event

© 2012 Autodesk Activity #3 DES IN CONSTRUCTION Planning of Construction-Related Production System Queue of Events Activity #1 Activity #2 Construction Site Day 4 Quantity of work Number of workers Production rate Quantity of work Number of workers Production rate New Event

© 2012 Autodesk Activity #3 DES IN CONSTRUCTION Planning of Construction-Related Production System Queue of Events Activity #1 Activity #2 Construction Site Day 6 Quantity of work Number of workers Production rate Quantity of work Number of workers Production rate Quantity of work Number of workers Production rate New Event

© 2012 Autodesk DES IN CONSTRUCTION Planning of Construction-Related Production System

© 2012 Autodesk Install Light Fixtures DES IN CONSTRUCTION 4D Model-based Time-Space Conflict Analysis Queue of Events Install Ductwork Install Pipes Day 0 Construction Site

© 2012 Autodesk Install Light Fixtures DES IN CONSTRUCTION 4D Model-based Time-Space Conflict Analysis Queue of Events Install Pipes Install Ductwork Day 1 Construction Site Workspace for ductwork installation

© 2012 Autodesk Install Light Fixtures DES IN CONSTRUCTION 4D Model-based Time-Space Conflict Analysis Queue of Events Install Ductwork Install Pipes Day 7 Construction Site Workspace for pipe installation

© 2012 Autodesk Install Light Fixtures DES IN CONSTRUCTION 4D Model-based Time-Space Conflict Analysis Queue of Events Install Pipes Day 10 Construction Site Workspace for lighting installation

© 2012 Autodesk DES IN CONSTRUCTION 4D Model-based Time-Space Conflict Analysis Clock Time Day 0 Day 7 Day 10 Event Day 1 Time-Space ConflictConflicting Spaces No Yes No Activity #1 Activity #2 Install Light Fixtures Install Ductwork Install Pipes - Install Ductwork

© 2012 Autodesk DES IN CONSTRUCTION 4D Model-based Time-Space Conflict Analysis  Safety risk analysis  Potential productivity loss

© 2012 Autodesk NEXT STEPS Modules in this class:  Module 1: What is Discrete Event Simulation (DES)?  Module 2: Construction Processes Which Can Benefit from Discrete Event Simulation  Module 3: Autodesk Navisworks to Link Clash Detection with Timeliner  Module 4: 4D Clash Detection on the University of Virginia Old Jordan Hall Mechanical Upgrade Project

© 2012 Autodesk Autodesk, AutoCAD* [*if/when mentioned in the pertinent material, followed by an alphabetical list of all other trademarks mentioned in the material] are registered trademarks or trademarks of Autodesk, Inc., and/or its subsidiaries and/or affiliates in the USA and/or other countries. All other brand names, product names, or trademarks belong to their respective holders. Autodesk reserves the right to alter product and services offerings, and specifications and pricing at any time without notice, and is not responsible for typographical or graphical errors that may appear in this document. © 2012 Autodesk, Inc. All rights reserved.