Phoenix, Arizona, United States
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Extensive experience in operations management and performance improvement leading company…

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Experience & Education

  • Paladin

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Volunteer Experience

  • Lean Supply Chain Co-Chair

    SME National Conference

    Education

Publications

  • Electronic Business Transaction Infrastructure Analysis using Petri Nets and Simulation

    Arizona State University

    Rapid growth in eBusiness has made industry and commerce increasingly dependent on the hardware and software infrastructure that enables high-volume transaction processing across the Internet. Large transaction volumes at major industrial-firm data centers rely on robust transaction protocols and adequately provisioned hardware capacity to ensure that the high-volume flow of daily business transactions is not interrupted. This research analyzes the robustness of eBusiness transaction…

    Rapid growth in eBusiness has made industry and commerce increasingly dependent on the hardware and software infrastructure that enables high-volume transaction processing across the Internet. Large transaction volumes at major industrial-firm data centers rely on robust transaction protocols and adequately provisioned hardware capacity to ensure that the high-volume flow of daily business transactions is not interrupted. This research analyzes the robustness of eBusiness transaction infrastructure using Petri nets and simulation to characterize two critical elements that were found to be problematic in industry: 1) a widely used electronic messaging protocol for eBusiness transactions called RosettaNet (RN), and 2) capacity planning for the bottlenecked application-server tier of hardware infrastructure used to process eBusiness transactions. Analysis of the RN protocol is based on reusable patterns for Petri net modeling of common protocol mechanisms such as retries, time-outs, and fault handling. These new patterns translate abstract representations of the RN standard into an executable model. A stochastic Petri net constructed from the patterns is simulated to generate performance curves based on varying network conditions, and analyzed using linear temporal logic to prove that the protocol can end processing in unsynchronized failure states that make resolution of the interchange problematic. This leads to suggested improvements in the protocol. Analysis of the application-server tier of the infrastructure used for processing eBusiness transactions is also performed to enable better capacity planning for robust operations. Improved planning for this infrastructure requires characterization of resource consumption patterns driven by two key factors affecting service performance and capacity: 1) the varying transaction load patterns, and 2) the variable delays incurred by downstream application services. Both factors are considered.

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  • Petri net translation patterns for the analysis of ebusiness collaboration messaging protocols

    IEEE Transactions on Systems, Man, and Cybernetics, Part A: Systems and Humans

    Electronic messaging protocols such as RosettaNet (RN) automate the asynchronous exchange of business documents between collaborating trading partners over the Internet. Such protocols commonly employ mechanisms such as retries, time-outs, and fault handling to overcome uncertainty in the timing and reliability of message transmission, receipt, and processing. To determine the reliability and performance of such a protocol under varying network and message processing conditions, we have…

    Electronic messaging protocols such as RosettaNet (RN) automate the asynchronous exchange of business documents between collaborating trading partners over the Internet. Such protocols commonly employ mechanisms such as retries, time-outs, and fault handling to overcome uncertainty in the timing and reliability of message transmission, receipt, and processing. To determine the reliability and performance of such a protocol under varying network and message processing conditions, we have developed reusable patterns for Petri net modeling of these common mechanisms and used them to assemble a timed Petri net simulation that represents the RN standard's behavior. The reusable patterns are derived through translation of the abstract representations provided in the RN standard into an executable model, paving the way for a multimodeling approach for supply chain communications. The resulting stochastic Petri net is simulated to generate performance curves guiding improved protocol reliability.

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  • Value Chains Versus Supply Chains

    BP Trends

    Derived from an essay written as part of my Ph.D. comprehensive exam, this article considers the nature of value chains and supply chains and discusses how companies can synchronize the two to optimize business performance.

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    • Dan Shunk
    • Tom Callerman
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  • A Distributed Information System Architecture for Collaborative Design

    Proceedings of the 2006 conference on Integrated Intelligent Systems for Engineering Design

    Improving and streamlining the communication and decision processes used in Collaborative Product Development (CPD) requires a robust Distributed Information System that can enable intelligent notification, coordination and negotiation processes. In this chapter we review existing research and industry practice related to CPD information systems and propose an information framework called the Virtual Environment for Product Development (VE4PD) that is based on the integration of Web services…

    Improving and streamlining the communication and decision processes used in Collaborative Product Development (CPD) requires a robust Distributed Information System that can enable intelligent notification, coordination and negotiation processes. In this chapter we review existing research and industry practice related to CPD information systems and propose an information framework called the Virtual Environment for Product Development (VE4PD) that is based on the integration of Web services and agent technologies to manage the CPD process. The VE4PD architecture is designed to support CPD functions such as design synchronization, timely notification, distributed control, role based security, support for distributed intelligent agents, and varying design rule standards. An implementation system including intelligent agents for design negotiation is also described that validates the application approach.

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  • Meta-modeling systems analysis primitives

    Ellis Horwood - Conceptual Structures

  • Google Scholar Citation List

    Google

    I was interested this week to learn that my research publicationns have been cited by other scholars over 400 times! I had never creted a Google Scholar profile until my son recommended it. What a nice surprise!

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Projects

  • IO.Anywhere Factory

    -

    Enabled rapid ramp-up of a business by designing and starting up a factory for modular data centers. With a production line that achieved stock-to-dock shipment within six days, the IO Factory developed the lowest-cost, rapid data center delivery mechanism in the industry.

    - Factory brought online to begin high-rate production of 1 module/day in just 3 months

    - Ramped up to produce 5 varieties and over 400 modules valued at $200M in 3 years

    - Reduced COGS by 10…

    Enabled rapid ramp-up of a business by designing and starting up a factory for modular data centers. With a production line that achieved stock-to-dock shipment within six days, the IO Factory developed the lowest-cost, rapid data center delivery mechanism in the industry.

    - Factory brought online to begin high-rate production of 1 module/day in just 3 months

    - Ramped up to produce 5 varieties and over 400 modules valued at $200M in 3 years

    - Reduced COGS by 10 points

    - Implementation received award from the Association for Manufacturing Excellence (AME)

    Other creators
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  • Acquisition synergy and plant consolidation

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    Integrated the acquisition of an add-on business obtaining synergies of $11M in 6 months:

    - Achieved $11M in acquisition synergies for a $52M add-on while completing a plant consolidation project on schedule

    Completed operational due diligence in preparation for the acquisition

    Developed the process for plant-to-plant product transfers and moved 49 products across 5 plants

  • Factory Performance Improvement

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    Implemented a performance improvement program for an international packaging company with the following results in 3-6 months:

    - Improved on-time in-full (OTIF) delivery to 99.2% from the low 90%'s

    - Reduced raw material losses > 50% (185,000 lbs./year)

    - Reduced setup times by 31% to recover over 1,000 annual hours of production time

  • IRIDIUM Satellite Program

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    Launched 72 satellites in just a year. 5 Days Dock to Dock!

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Organizations

  • Turnaround Management Assocation

    -

    - Present
  • Aerospace and Defense Forum

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