Horizon Systems Modeling, LLC


When you come to us with a systems problem, the first thing we do is to quantify the
potential return on your modeling investment. To do this,  we provide you with a
high-level systems analysis that relates the structure of your problem to your
business objectives. This analysis provides you with a means to:


If you then decide to embark on a modeling journey with us, we get down to the
business of developing a customer requirements document (CRD) for your project.
We use the CRD as a vehicle to communicate to you:

  1. A definition of the problem
  2. The objectives for the project
  3. The minimum set of deliverables required to satisfy the objectives
  4. The discrete phases required to meet the deliverables
  5. An estimate of the time required for each phase
  6. Our approach for meeting the deliverables in each phase

In order to maximize the potential value and minimize the risks of the time you spend
working with us, we break your project into a number of self-contained phases with
their own set of deliverables. This provides you with an opportunity to continuously
re-evaluate the direction of the project and to make adjustments before advancing
to the next phase.

We solve most of our customer problems using the
Extend simulation package
created by
Imagine That!, Inc.. Extend provides us with a very effective means to
graphically represent and quantitatively analyze your problem in a short amount of
time. We create Extend models to help you visualize the hidden structures
controlling the behaviors of your system. When necessary, we create customized
input and output data management programs in Excel to help you quickly configure
your Extend simulation models and interpret the model outputs.

While the number of phases varies from project to project, every project we do has
four critically important phases:

  1. Proof-of-concept
  2. Validation
  3. Analysis
  4. Final report

We start every project by developing a proof-of-concept simulation model. This
ensures the feasibility of our approach and provides you with a means to directly
evaluate and make corrections to our approach.

Following a detailed review of the proof-of-concept model, we implement the
features required in the simulation model to validate its behavior against the
historical behavior of your system. Once the behavior of the simulation model
matches historical behavior to within an agreed upon level, the project moves into
the analysis phase.

In the analysis phase, proposed solutions to your problem are tested and the
resulting behaviors are quantified and summarized. This phase often leads to an
iterative process of making refinements to the simulation model to further
understand observed behaviors and/or to enable the testing of previously
unidentified alternatives.

The final phase consists of producing a report that summarizes the alternatives
tested and observed results. For this phase, we use an agreed upon set of metrics
to compare the performance of the system for each alternative tested. We deliver
this report in a written, graphical and numerical form that provides you with the
information required to meet the specified objectives of the project.
How we do it