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Simulation and optimization for
freight, rail and maritime
operations.

Doryven builds the models that answer capital and operating questions before the money is committed — and hands you the model, not just the report.

Discuss a project How we work

CAPABILITIES

What we are engaged to do

Four kinds of work. Most engagements combine two of them.

  • Simulation

    Discrete-event, agent-based and network-level models of how a system actually behaves under load.

    Deliverable: a calibrated model and its source

  • Optimization

    Routing, scheduling and capacity allocation — finding the policy that performs, not just the one that works.

    Deliverable: policy recommendation with sensitivity

  • Automation

    Turning a validated model into a decision tool your team runs without us.

    Built this way: Smart Attendance

  • Digital twins

    Live operational models fed by real data, kept aligned with the asset over time.

    Deliverable: a maintained twin and its data contract

PLATFORMS

The simulators behind the work

Open-source simulation engines maintained by Doryven and used in our own engagements. Every method behind them has been through peer review.

  • NeTrainSim

    Rail networks

    Network-level freight train simulation for longitudinal motion, energy consumption and carbon footprint.

    MAINTAINED BY DORYVEN

    GPL-3.0

    github.com/doryven/netrainsim

  • ShipNetSim

    Maritime & ports

    Multi-ship simulation using Holtrop resistance and B-series propeller analysis, with a GPS-spoofing resilience module.

    MAINTAINED BY DORYVEN

    GPL-3.0

    github.com/doryven/shipnetsim

  • CargoNetSim

    Multimodal freight

    Agent-based modelling coupled with system dynamics across rail, maritime, road and terminal systems.

    MAINTAINED BY DORYVEN

    GPL-3.0

    github.com/doryven/cargonetsim

Each platform is open source under GPL-3.0. The methods are published; the code is auditable rather than taken on trust.

APPROACH

How an engagement runs

  1. 01

    Calibrate

    against observed operations, not assumptions

  2. 02

    Construct

    scenarios that answer the actual question

  3. 03

    Optimize

    policy and capacity across the scenario set

  4. 04

    Report

    with sensitivity, and hand over the model

What you receive

  • The calibrated model and its source code
  • A scenario report with sensitivity analysis
  • Optimization results and a recommended policy
  • A briefing to your technical and executive teams

We do not deliver a PDF and keep the model. That is the point of the practice.

INDUSTRIES

Where the work happens

  • Rail networks
  • Maritime
  • Ports & terminals
  • Freight
  • Logistics
  • Infrastructure

PUBLICATIONS & VALIDATION

The method is on the record

We publish the models rather than describe them. Every claim below is externally checkable.

ABOUT

An engineering practice built around simulation

We develop the models that answer capital and operating questions in freight, rail and maritime systems — and we publish the methods behind them. Our work has been peer-reviewed in Applied Energy, Railway Engineering Science and the Journal of Marine Science and Engineering.

The simulation platforms we maintain are open source under GPL-3.0, so our methods can be audited rather than taken on trust.

We work with agencies, operators and infrastructure owners who need a defensible answer before committing capital.

CONTACT

Tell us the question you
need answered.

Most engagements begin with a scoping call. Bring the decision you are trying to make — we will tell you whether a model is the right tool.

Response within two working days