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Lindsay Olive Company

Aeronautics

. Simulation Magazine
Front Cover Art
August 2000

Simulation Magazine - August 2000Each month, Simulation magazine features a different simulation application on its cover. Read articleIn August 2000, a model of an airport security checkpoint was selected.This model utilized Extend bundled with Proof Animation (Extend Suite) to simulate and animate proposed changes to an existing security system.

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Agent-Based Modeling

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Donald Dudenhoeffer and Michael Jones, Center for Human-System Simulation, Idaho National Engineering and Environmental Laboratory
Presented at the Winter Simulation Conference 2000

Download articleThis paper describes a flexible architecture for modeling thousands of autonomous agents simultaneously. The agents' behavior is based on a subsumption architecture in which individual behaviors are prioritized with respect to all others. The primary behavior explored in this work is a group formation behavior based on social potential fields. It extends the social potential field model by introducing a neutral zone within which other behaviors may exhibit themselves.

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Agricultural Modeling

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Shahab Sokhansanja, Amit Kumarc, and Anthony F. Turhollowa
Science Direct

October 2006

Download pdf version of the articleThis paper describes the framework development of a dynamic integrated biomass supply analysis and logistics model (IBSAL) to simulate the collection, storage, and transport operations for supplying agricultural biomass to a biorefinery. The model built in Extend consists of time dependent events representing the working rate of equipment and queues representing the capacity of storage structures. Weather conditions including rain and snow influence the moisture content and the dry matter loss of biomass through the supply chain and are included in the model.

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Elliot Sloane, Thomas Way, Vijay Gehlot, Anany Levitin, and Robert Beck
Villanova University

Presented at the IEEE System of Systems Conference, San Antonio, Texas, April 16-18, 2007

Download pdf version of the articleThe emerging National Healthcare Information Network (NHIN) is intended to improve the efficacy, efficiency, and safety of healthcare. At the same time, Service Oriented Architectures (SOAs) are rapidly becoming an accepted means of providing network information exchange across a heterogeneous fabric of node, and may be suitable for a nextgeneration NHIN-2s. Given the complexity NHIN and SOA due to multiple levels of system interactions, creating a valid and usable SoSE model for SOA application using a single technique that captures the
desired level of details can be a daunting task.

This paper details a hybrid approach to modeling and simulation of a specific SOA (named MCSOA) and has been configured for potential defense applications. Further, it shows how MCSOA could be used to link low-communications-capability healthcare data from sources like the Alaska Telemedicine Testbed Project (ATTP) to the proposed NHIN-2.

 

 

Architectural Modeling

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Susan O'Hara, RN, MPH (O'Hara HealthCare Consultants), Dave Krahl (Imagine That Inc) and Mark Sullivan, AIA, NCARB (Mark Sullivan Architects)
Winter Simulation Conference 2004

.This case study demonstrates the value of simulation modeling in the healthcare architecture design of a new ambulatory surgery unit. The simulation developed explores the relationship between the number of operating rooms and recovery beds, the number of cases and the phases of recovery, bed capacity, staffing, and waiting room seat requirements as each affected the design. Model results allowed time for variations in the design to meet the client's needs before the project was built. Furthermore, the simulation shows the positive outcome of combining the experience of three professional disciplines: healthcare planning, architecture, and simulation modeling for nurses, doctors and patients of the new ambulatory surgery unit.

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Biotechnology

. Facility Design: Simulation Methodology for Facility Design
How simulation software can be used effectively as a capacity planning and design tool.

Jim Curry, OpStat Group, Inc.
BioPharm International
Jun 1, 2007

Facility DesignGo to Facility Design articleDesigning a new biological facility or planning the expansion of an existing one requires evaluation of several parameters related to product characteristics, equipment capability, and facility capacity. Decisions made at the design stages are critical to the validation plan and the ongoing operation if it is a commercial facility. Whether the facility will provide the needed future capacity is one of the critical questions requiring a credible answer. This article describes a methodology that uses Extend simulation software as a capacity planning and design tool.

 

 
 




   

 

Read article Simulations Improve Production Capacity
  BioPharm International
Marc Puich & Amit Paz

May 1, 2004

BioPharmAs biotechnology organizations have successfully launched new products, the challenges of producing adequate quantities have grown. Simulation is a powerful tool that can offer many benefits if done right and used appropriately. This general overview compares static and dynamic modeling and their usefulness in the biotechnology field.

Business Modeling

Download article

Computer Simulation Modeling of Recreation Use: Current Status, Case Studies, and Future Directions

  David N. Cole, Rocky Mountain Research Station, United States Department of Agriculture
September 2005
RecreationThis report compiles information about recent progress in the application of simulation to planning and management of recreation use, particularly in parks and wilderness. The bulk of this report consists of case studies that illustrate a broad array of recreational situations and management applications for simulation modeling.
Download pdf version of the article

A Discrete Event Simulation of a Municipal Street Tree Maintenance Operation

  Journal of Arboriculture - James McCabe
May 2002
The author created a model of a typical municipal street tree maintenance operation including variables such as incoming work orders, crew assignments, and productivity standards. This model provides a foundation from which managerial decision making and a typical tree care operation may be analyzed.
Download paper A Multi-Echelon Systems’ Simulation Model For Repairable and Consumable Items Management: A Case Study
  POMS 16th Annual Conference
M. Elisa Cunha, Dep. Ciências e Tecnologias, Univ. Autónoma de Lisboa; A. Paula Barbosa Póvoa, Centro de Estudos de Gestão; & A. Assis Lopes, Dep. Economia e Gestão, Univ. Lusíada de Lisboa, Portugal

May 2005

Inventory management of multi-echelon repairable item structures has been largely studied. Restrictions on its applications to real case problems were difficult to overcome. To surpass some of these limitations, the authors used Extend to create a simulation model that not only examines a multi-echelon structure system, but also permits the explicit consideration of a hierarchical structure for repairable and consumable items. Model results balance inventory policy which guarantees a certain level of service accounting for operations occurrence and repairs conditions.

Read article Reinventing a Major Electric Power Provider With the Help of Simulation Software
  CAPI In a major reengineering effort, an electric power provider had a model developed that would assess their organizational and management structure, make recommendations on how to redefine processes, and develop a new performance measurement system tied to profits, as opposed to costs.
Read article Simulation - An Enabling Technology in Software Engineering
  Software Engineering Institute
Alan M. Christie

This paper aims to raise awareness about the usefulness and importance of simulation in support of software engineering. Features an Extend model that depicts a call-center type of process for a computer security incident response team.

Read article Using Simulation as a Decision-Making Tool in the Customer Service Operations of LEXIS-NEXIS
  CAPI Due to increases in sales volume, a provider of enhanced information services and management tools customer base had grown, resulting in an increased number of phone calls, which demanded greater resources. They commissioned the development of a simulation model to determine how to continue to be responsive to its customers, while managing costs.
Read article Using Simulation to Plan the Utilization of Kitchen Staff
  CAPI

A quick-service restaurant chain's use of simulation shows corporate management every step in each kitchen to allow them to develop work schedules that assures freshness of food products even with the addition of new menu items.

Read article What are the CAPI Balanced Scorecard and EVA Models
  CAPI

The Balanced Scorecard Economic Value Added (EVA) Model is a comprehensive and fully integrated financial analysis tool designed to provide the backbone and baseline for reengineering and operations improvements. This article describes this type of model using examples from a model designed around the organizational framework of a large utility company operating via Strategic Business Units (SBUs).

Capacity Planning
Read article

Computer Simulation Modeling for Recreation Management: A Study on Carriage Road Use in Acadia National Park, Maine, USA

  Environmental Management
Benjamin Wang, Robert E. Manning
January 1999
Use of computer simulation as a tool for describing visitor travel on the carriage roads of Acadia National Park, Maine, USA. The findings of this study suggest that computer simulation is useful for estimating current carrying capacity conditions, predicting future conditions, and guiding related research.
Download pdf version of the article

Dynamic Simulator for WIP Analysis in Semiconductor Manufacturing

  ISSM Conference Dr. Donald W. Collins, Vijay Lakshman, and Luc D’Arcy Collins
October 2001
Describes the implementation of a FAB Simulator and Capacity Planner in a semiconductor FAB in Arizona that assists the operational planner with the planning of the daily production mix. This paper was presented to top semiconductor firms from all over the world at the International Symposium Semiconductor Manufacturing conference.
Integrated Resource Planning Model (IRPM)
 

Reid Kress,
Richard Rinehart of Y-12 National Security Complex
Simulation Dynamics, Inc.

Presented at Winter Simulation Conference
2004

PowerPoint presentation of a decision support tool used for long-term, rough-cut resource and capacity planning. IRPM evaluates the impact of rapidly changing schedules, variable budgets, and changing resource bases (i.e., personnel, equipment, and facilities and their effects on schedule performance, projected cost, and resource utilization).
Download pdf version of the article Lindsay Olive Company Thrives on Simulation
  Food Online
March 24, 1999

Case study in which a simulation project manager wanted to determine current plant capacity and be able to test the effects of various changes. This article discusses models that examined the balance between the "making" and "packing" systems during an annual production cycle.

Read article Simulation: Operations Excellence Tool in Lean Manufacturing
  OpStat Group, Inc.
Jim Curry

Presented at APICS May 2006

Good overview paper on the use of Extend in lean manufacturing. Defines simulation and highlights a few areas where it can be most valuable.

Using Simulation to Improve the Patient Pre-admission Testing Design Process
  Winter Simulation Conference 2004
Susan O'Hara, RN MPH (O'Hara HealthCare Consultants), Mark Sullivan, AIA, NCARB (Mark Sullivan Architects) and Henry Bell (Smoky Mountain Simulation Services)

Simulation modeling is a tool of hospital-wide system process change with a focus on improving patient satisfaction through a better clinical process. Some of the improvements, based on existing systems, include decreased delays, better healthcare staff utilization and tailored scheduling. In this part 2 of 2 perioperative case studies (part 1: Ambulatory Surgery Unit), the experiences of three distinct, yet complimentary professions are combined and opitimized: nursing/healthcare planning, architecture, and simulation engineering to create a better way to provide a clinical service in a newly designed healthcare space. Complete paper to be posted soon.

Chemical Processing
Read article

Combining Simulation with RTN Optimization for Multi-product Chemical Processes

  Scott J Bury, Naoko Akiya, and Jeff Ferrio (Dow Chemical Company)
Presented at the Winter Simulation Conference 2004
This case-study presents multi-product batch optimal scheduling using Resource-Task Networks (RTN). This combined approach of discrete-event simulation and deterministic optimization has provided rapid improvements in the scheduling technology.

Communication Systems
Download NETE Model paper NCW End-To-End (NETE) Model For Future C2 Architecture Assessments
  2005 International Command and Control Research and Technology Symposium
The Future of Command and Control
Jim Walsh, Jeff Roberts, and Wayne Thompson from SPARTA, Inc.

March 15, 2005

In this paper, NETE -- a Net-Centric Warfare (NCW) End-to-End model is discussed. NETE is a medium fidelity constructive simulation of the Global Information Grid (GIG) infrastructure, Service networks, and their integrated operations in support of definable mission areas. The NETE model provides a means to assess the ability of a defined network to support a concept of operations with resource management to allow the assessment of latencies under varying loads. NETE also calculates the impact of network ‘jitter’ on mission timelines.

Read article Simulation Streamlines Production, Shaves Cost
  US Tech Interactive
March 1999
Digital wireless communications products and technologies manufacturer streamlines its equipment manufacturing processes and improves inventory control, generating significant cost savings.

Engineering
Read article

Zapping System Bugs Through Performance Engineering

  The MITRE Digest
Cheryl Balian
May 2006

The MITRE DigestA group of engineers at MITRE collaborated and are emphasizing how the performance engineering (PE) practice assures systems meet their operational performance goals. To that end, MITRE engineers have developed a number of PE tools, such as the Modeling Environment for SOA Analysis (MESA). MESA (developed in Extend) provides end-to-end modeling and simulation environments for studying service-oriented architectures (SOA).

Environmental Modeling
Download article Application of a Dynamic Model to the Simulation of the Composting
Process
 

D.S.F. Neves, A.P.D. Gomes, L.A.C. Tarelho, and M.A.A. Matos
Department of Environment and Planning, University of Aveiro, Portugal

Presented at the Eleventh International Waste Management and Landfill Symposium
October 2007

The composting process applied to the treatment of biodegradable waste materials is one of the most adequate ways to enhance the environmental performance of the municipal solid waste (MSW) management systems. In the European context where environmental policies tend to encourage solid waste minimization and recycling, home composting is an effective method to decrease the quantity of MSW to be disposed. Home composting can be used for the conversion of the organic fraction of household wastes to a stable humus-like material (the compost).

This paper presents a dynamic model that simulates the biological composting process, applied to the organic fraction of the municipal solid waste.

Download article Results from the sCOMPOS model.
Read article

Computer Simulation Modeling for Recreation Management: A Study on Carriage Road Use in Acadia National Park, Maine, USA

  Benjamin Wang, Robert E. Manning
Environmental Management

January 1999
Use of computer simulation as a tool for describing visitor travel on the carriage roads of Acadia National Park, Maine, USA. The findings of this study suggest that computer simulation is useful for estimating current carrying capacity conditions, predicting future conditions, and guiding related research.
Download article Computer Simulation Modeling of Recreation Use: Current Status, Case Studies, and Future Directions
  David N. Cole, Rocky Mountain Research Station, United States Department of Agriculture
September 2005
RecreationThis report compiles information about recent progress in the application of simulation to planning and management of recreation use, particularly in parks and wilderness. The bulk of this report consists of case studies that illustrate a broad array of recreational situations and management applications for simulation modeling.
Download pdf version of the article

Evaluating Low Impact Development Practices for Stormwater Management on an Industrial Site in Mississippi

  Dennis S. Painter & Donald Becker, Tennessee Valley Authority; Avinash S. Patwardhan, Thomas Jobes, & Patrick Graham, CH2M HILL TVAThis paper describes methodologies used to perform stormwater evaluations at a Tennessee Valley Authority (TVA) facility, including hydrologic and water quality modeling. The hydrologic and water quality modeling was accomplished with the use of the LIFE™ model, developed in Extend by CH2M HILL to simulate Low Impact Development (LID). TVA is in the process of installing several demonstration projects using LID designs.
Green Energetics Green Energetics
  The Strategic Environmental Research and Development Program
August 2000

An energetic materials environmental study was completed with participation from NASA, the Environmental Protection Agency, and others to define the environmental impact of energetic materials. The Extend model developed for this project helped to identify eleven areas for which The Strategic Environmental Research and Development Program (SERDP) might consider promoting future research and development work, plus the model calculated the propellant cost for each manufacturing activity.

Download pdf version of the article LIFE™ Model
  CH2M Hill

CH2M HillDeveloped in Extend, the LIFE (Low Impact Feasibility Evaluation) model establishes functional connections between different land uses and landscape features. It can be used for:

bullet Design of volume or water quality based stormwater controls.
bullet Review of development/re-development plans for compliance with stormwater regulations.
bullet Incentive-based approaches such as environmental credit trading.
bullet Public education and outreach.
Model-based Green Gun Propellant Model-based Green Gun Propellant
  Naval Defense Center for Environmental Excellence
December 2003

The Indian Head Division Naval Surface Warfare Center (IHD/NSWC) contracted the National Defense Center for Environmental Excellence (NDCEE) to develop a process and environmental cost-analysis simulation for gun propellant processing. Using Extend, they built a model specific to the extrusion of both solvent and solventless thermoplastic elastomer (TPE) propellants. This model accurately predicts the cost impacts of alternative processes before implementation can be initiated.

Potential Effects of Long-Lead Hydrologic Predictability on Missouri River Main-Stem Reservoirs
  Journal of Climate 2004
Issue 17, Volume 2
Edwin P. Maurer, Dept. of Civil Engineering, Santa Clara University, Santa Clara, CA & Dennis P. Lettenmaier, Dept. of Civil and Environmental Engineering, University of Washington, Seattle, WA

American Meteorological SocietyUsing Extend, the authors constructed a system model, MOSIM, that uses the physical reservoir data and minimum releases for hydropower and environmental constraints from a long-term study of the Missouri River basin. The value was based on the hydropower generated by the main-stem dams for a simulated period of 1898–1996 using MOSIM. Simulated forecasted flows were generated to represent the levels of predictability that had been determined in a previous study. The results demonstrate that use of climate forecast information along with better definition of the basin moisture states can improve runoff predictions with modest economic value that, in general, will increase as the size of the reservoir system decreases.

Download article Storm Planning Model
  Davies Consulting Inc.
June 2007

In collaboration with a major utility facing major storms on an annual basis, Davies Consulting Inc. developed an innovative simulation model that allows decision makers to evaluate the affect of strategic decisions on storm restoration prior to and after a storm has struck.

Facility Design
Go to Facility Design article

Facility Design: Simulation Methodology for Facility Design
How simulation software can be used effectively as a capacity planning and design tool.

  BioPharm International
Jim Curry, OpStat Group, Inc.

Jun 1, 2007

Facility DesignDesigning a new biological facility or planning the expansion of an existing one requires evaluation of several parameters related to product characteristics, equipment capability, and facility capacity. Decisions made at the design stages are critical to the validation plan and the ongoing operation if it is a commercial facility. Whether the facility will provide the needed future capacity is one of the critical questions requiring a credible answer. This article describes a methodology that uses Extend simulation software as a capacity planning and design tool.

Food Manufacturing
Read article Using Simulation to Plan the Utilization of Kitchen Staff
  CAPI

A quick-service restaurant chain's use of simulation shows corporate management every step in each kitchen to allow them to develop work schedules that assures freshness of food products even with the addition of new menu items.

Read article Virtual Engineering's New Frontier
  Food Engineering Magazine
Kevin T. Higgins
July 2001

Packages that accurately emulate the hybrid processes that characterize food and beverage manufacturing are making simulation more than just a snazzy presentation tool for upper management. Users are roughing out their production and packaging lines on screen to gain insight into the dynamics of their lines and where and why bottlenecks occur.

Government
Read article

Air Mail Facility Simulation

  CAPI United States Air Mail Facilities (AMF) simulation designed to investigate operational and technological enhancements necessary to maintain timely delivery of the mail while facing increasing volumes of mail.
Download pdf version of the article

Extend Helps Contractor Save Money

  IIE Solutions
December 1996
Project undertaken by the Department of Energy Strategic Petroleum Reserve (SPR) to reengineer its supply chain to reduce expenses, decrease need-fulfillment time, and improve the storage and dissemination of information.
Read article FASTNET "Break-Even" Analysis Simulation
  CAPI

Simulation developed for the United States Postal Service that examines labor and equipment costs associated with the implementation of a new service in various demographic areas and predicts when this service would result in a return on invested capital.

Green Energetics Green Energetics
  The Strategic Environmental Research and Development Program
August 2000

An energetic materials environmental study was completed with participation from NASA, the Environmental Protection Agency, and others to define the environmental impact of energetic materials. The Extend model developed for this project helped to identify eleven areas for which The Strategic Environmental Research and Development Program (SERDP) might consider promoting future research and development work, plus the model calculated the propellant cost for each manufacturing activity.

Download NETE Model paper NCW End-To-End (NETE) Model For
Future C2 Architecture Assessments
  2005 International Command and Control Research and Technology Symposium
The Future of Command and Control
Jim Walsh, Jeff Roberts, and Wayne Thompson from SPARTA, Inc.

March 15, 2005

In this paper, NETE -- a Net-Centric Warfare (NCW) End-to-End model is discussed. NETE is a medium fidelity constructive simulation of the Global Information Grid (GIG) infrastructure, Service networks, and their integrated operations in support of definable mission areas. The NETE model provides a means to assess the ability of a defined network to support a concept of operations with resource management to allow the assessment of latencies under varying loads. NETE also calculates the impact of network ‘jitter’ on mission timelines.

Read article Priority Mail TnT (Track and Trace) Network Traffic/Cost Simulation
  CAPI The United States Postal Service developed a model that would determine network traffic that would result from tracking Priority Mail through the entire delivery process and would predict associated costs.
Read article TnT (Track and Trace) Cost Simulation
  CAPI

The United States Postal Service commissioned the development of a model that would look at different technological approaches, different marketing approaches, and so on of implementing a new service in a reliable, cost-effective manner.

Read article Vehicle Maintenance Facility Simulation
  CAPI Study of the United States Postal Service's use of simulation to determine the staff required and costs associated with the maintenance of postal owned vehicles for a user defined area.

Healthcare / Medical Modeling

 
Journal of Immunology

Discrete Event Modeling of CD4+ Memory T Cell Generation

  Martin S. Zand, Benjamin J. Briggs, Anirban Bose, and Thuong Vo
The Journal of Immunology

2004
Studies of memory T cell differentiation tend to be hampered by a lack of quantitative models to test hypotheses in silico before in vivo experimentation. Using Extend, researchers from the Nephrology Unit and Department of Surgery at the University of Rochester Medical Center in Rochester, New York built a model of CD4+ memory T cell generation capable of tracking individual lymphocytes.
Read article

Discrete Event Simulation of Emergency Department Activity: A Platform for System-level Operations Research

  Journal of Academic Emergency Medicine
Lloyd G. Connelly, PhD and Aaron E. Bair, MD

November 2004
Explores the potential of discrete event simulation (DES) methods to advance system-level investigation of emergency department (ED) operations. To this end, the authors describe the development and operation of Emergency Department SIMulation (EDSIM), a new platform for computer simulation of ED activity at a Level 1 trauma center. The authors also demonstrate one potential application of EDSIM by using simulated ED activity to compare two patient triage methods.
Download pdf version of the article Improving Access to Psychological Therapies
  Focused_On Limited
2007
Working with the South Tyneside Primary Care Trust, Focused_On Health Limited used Extend to help redesign processes to improve patient access to psychological therapies, deliver greater care, and provide a better value for the money.
Read article Hypothalamic-pituitary-adrenal Axis Modeling
  Children's Hospital Informatics Program

This paper describes the construction of a computer model that simulates the hypothalamic-pituitary-adrenal axis (HPA axis) regulation of cortisol production.

Download pdf version of the article Simulating Six Sigma Improvement Ideas for a Hospital Emergency Department
  Winter Simulation Conference 2003
Martin J. Miller, David M. Ferrin (Business Prototyping Inc.), and Jill M. Szymanski (Baptist Health South Florida)

A large hospital in southeast United States utilized simulation to aid project leaders in advancing to the next level of sophistication with Six Sigma. The project produced an ongoing, workable model from which potential process improvements in their Emergency Department (ED) were simulated. Project leaders tested several scenarios in the ED Simulation to quantify their value proposition. The simulation model also enabled the hospital to test design ideas of a planned new facility.

The Use of Simulation Modeling in Healthcare Planning
Ambulatory Surgery Unit
  Winter Simulation Conference 2004
Susan O'Hara, RN, MPH (O'Hara HealthCare Consultants), Dave Krahl (Imagine That Inc) and Mark Sullivan, AIA, NCARB (Mark Sullivan Architects)

This case study demonstrates the value of simulation modeling in the healthcare architecture design of a new ambulatory surgery unit. The simulation developed explores the relationship between the number of operating rooms and recovery beds, the number of cases and the phases of recovery, bed capacity, staffing, and waiting room seat requirements as each affected the design. Model results allowed time for variations in the design to meet the client's needs before the project was built. Furthermore, the simulation shows the positive outcome of combining the experience of three professional disciplines: healthcare planning, architecture, and simulation modeling for nurses, doctors and patients of the new ambulatory surgery unit.

Using Simulation to Improve the Patient Pre-admission Testing Design Process
  Winter Simulation Conference 2004
Susan O'Hara, RN MPH (O'Hara HealthCare Consultants), Mark Sullivan, AIA, NCARB (Mark Sullivan Architects) and Henry Bell (Smoky Mountain Simulation Services)

Simulation modeling is a tool of hospital-wide system process change with a focus on improving patient satisfaction through a better clinical process. Some of the improvements, based on existing systems, include decreased delays, better healthcare staff utilization and tailored scheduling. In this part 2 of 2 perioperative case studies (part 1: Ambulatory Surgery Unit), the experiences of three distinct, yet complimentary professions are combined and opitimized: nursing/healthcare planning, architecture, and simulation engineering to create a better way to provide a clinical service in a newly designed healthcare space. Complete paper to be posted soon.

High Speed Flow Lines
Read article

Flow architecture simulation: a powerful approach to buffer dimensioning in high-speed packaging lines

  Ricardo Rodríguez & Rosana Marino,
S&T - Servicio y Tecnología S.A.

2001
Pilot experience in the adoption of performance simulation approach to design, redesign, and acquisition of bottling lines. Discusses the management of huge bottling resources of a company: more than 36 lines in 12 factories, in 6 countries, with an aggregated investment value of $ 200 million, occupying more than a thousand people and producing 250 million cases a year of 300 different SKUs.

Inventory Management
Read article How a Leading Industrial Manufacturer is Redirecting Production and Distribution Through Simulation and Modeling
  CAPI

Inventory management model developed for a growing industrial manufacturer.

Read article Inventory Modeling Yields Significant Cycle-Time Improvements
  Solid State Technology - Dr. Donald W. Collins
January 1999

Simulation of a wafer fabrication line to assist in the meeting of delivery schedules, reducing product cycle times, increasing product yield and throughput, optimizing equipment utilization, and increasing confidence for on-time delivery and profits.

Download paper A Multi-Echelon Systems’ Simulation Model For Repairable and Consumable Items Management: A Case Study

1.45 MB

POMS 16th Annual Conference
M. Elisa Cunha, Dep. Ciências e Tecnologias, Univ. Autónoma de Lisboa; A. Paula Barbosa Póvoa, Centro de Estudos de Gestão; & A. Assis Lopes, Dep. Economia e Gestão, Univ. Lusíada de Lisboa, Portugal

May 2005

Inventory management of multi-echelon repairable item structures has been largely studied. Restrictions on its applications to real case problems were difficult to overcome. To surpass some of these limitations, the authors used Extend to create a simulation model that not only examines a multi-echelon structure system, but also permits the explicit consideration of a hierarchical structure for repairable and consumable items. Model results balance inventory policy which guarantees a certain level of service accounting for operations occurrence and repairs conditions.

Read article Simulation Streamlines Production, Shaves Cost
  US Tech Interactive
March 1999
Digital wireless communications products and technologies manufacturer streamlines its equipment manufacturing processes and improves inventory control, generating significant cost savings.

Lean Manufacturing / Six Sigma
Download article Focus on Lean: Simulation Technology
  Jim Curry, OpStat Group, Inc.
APICS eNews
June 6, 2006

APICS eNewsBrief introductory article discussing the key element in lean implementation: simulation.

  Improving Distribution Center Operations Through Simulation At Crutchfield Corporation
  Paul G. Sherland, Rust Management Technology, LLC and David Luria, Crutchfield Corporation
Presented at the Winter Simulation Conference 2004

Working as a team, Crutchfield Corporation, a major consumer electronics catalog and Internet retailer, and Rust Management Technology used Extend and ExpertFit to develop and validate a distribution center process simulation using Six Sigma techniques. Using insights developed through the simulation, Crutchfield Corporation estimates that it will save 15 to 20 times the cost of the project in the first year after deployment. Paper is currently not available online.

Download pdf version of the article A Lean Analysis Methodology Using Simulation
  SME Technical Paper Jim Curry, OpStat Group, Inc.
March 2007

This paper presents a case study where simulation was used to convert from a manufacturing resource planning (MRP) based push process to a demand-driven pull process in a single plant operation factory floor.

Download pdf version of the article Lean Simulation Models
  Jim Curry, OpStat Group, Inc.
Presented at the Automated Lean & Quality Resource Center at EASTEC, May 25, 2006

Introduces the use of simulation models as essential tools for lean programs to test alternative solutions before implementing them. Mr. Curry highlights benefits of using Extend and includes screenshots of numerous sample models.

Download pdf version of the article Simulating Six Sigma Improvement Ideas for a Hospital Emergency Department
  Winter Simulation Conference 2003
Martin J. Miller, David M. Ferrin (Business Prototyping Inc.), and Jill M. Szymanski (Baptist Health South Florida)

A large hospital in southeast United States utilized simulation to aid project leaders in advancing to the next level of sophistication with Six Sigma. The project produced an ongoing, workable model from which potential process improvements in their Emergency Department (ED) were simulated. Project leaders tested several scenarios in the ED Simulation to quantify their value proposition. The simulation model also enabled the hospital to test design ideas of a planned new facility.

Read article Simulation Modeling in Lean Programs
  OpStat Group, Inc.
Jim Curry

Presented at APICS May 2006

Good overview paper on the use of Extend in lean manufacturing. Defines simulation and highlights a few areas where it can be most valuable.

Logistics
Read article Cognitive Process Simulation in Wine Making: Determining the Best Route for Wine Transfers
 

Wine Business Monthly
October 2000

Use of simulation to create a cognitive model of the actions of certain winery workers.
Download pdf version of the article

Development and implementation of integrated biomass supply analysis and logistics model (IBSAL)

  Shahab Sokhansanja, Amit Kumarc, and Anthony F. Turhollowa
Science Direct

October 2006
This paper describes the framework development of a dynamic integrated biomass supply analysis and logistics model (IBSAL) to simulate the collection, storage, and transport operations for supplying agricultural biomass to a biorefinery. The model built in Extend consists of time dependent events representing the working rate of equipment and queues representing the capacity of storage structures. Weather conditions including rain and snow influence the moisture content and the dry matter loss of biomass through the supply chain and are included in the model.
Chem-Bio Defense Quarterly Modeling and Simulation Impacts Complex Design and Programmatic Decisions
  Chem-Bio Defense Quarterly
April-June 2006

Modeling and Simulation Impacts Programmatic DecisionsThe Guardian Installation Protection Program (IPP), a program within the Joint Program Executive Office for Chemical and Biological Defense to protect 200 military installations world-wide from chemical, biological, and radiological threats, developed and accredited the IPP System Effectiveness Model. This model helps evaluate installation designs and make programmatic decisions. It assists a product manager to make a myriad of acquisition and design decisions and measure the performance of a design before it is fielded. By catching key design flaws before they are fielded, analysis can be performed to help define alternative operational procedures and new design requirements early in the acquisition process and avoid fielding delays and unexpected costs. This innovative toolset is the first of its kind that has the ability to effectively model complex military environments, multiple threats, and innovative designs that combine materiel and non-materiel components into one Family of Systems.

Download pdf version of the article Modeling and Simulation Support for the Standing Joint Force Headquarters Concept
  10th International Command and Control Research & Technology Symposium
Susan Hutchins, Gordon Schacher, John Looney, Jack Jensen, John Osmundson, and Shelley Gallup from the Naval Postgraduate School; James Dailey and Steven Saylor from The Boeing Company

May 2005

Boeing and the Naval Postgraduate School (NPS) developed an Extend model of an organizational concept called Standing Joint Forces HQ (SJFHQ) being developed at the U.S. Joint Forces Command (JFCOM). The modeling objective was to measure personnel utilization