Rising bars whose tops trace an efficient frontier curve, with the chosen option marked BEST TRADE-OFF OPTIONS TESTED → OUTPUT ↑

Manufacturing & supply chain simulation Decisions backed by evidence.
Simulate before you spend.

We build simulation software and AI agents for production lines and supply chains, for manufacturers that include many Fortune 500 operators. The work pairs artificial intelligence with operations research to explore the efficient frontier for your problem.

A few of the 300+ organizations we’ve built for since the early 1990s

Our simulation software, from one machine to the whole network

ReliaSim models production lines, plants and supply chains from your own stop data and checks the model against what the plant actually did. A customer’s published paper reports the model within about 1% OEE of the plant. Then you test the change on the model before you try it on the plant.

A machine

How it fails and recovers

Fit failure and repair patterns from your stop history with ReliaStats®.

A line

Where the output goes

Find the real bottleneck and rank which stops are worth fixing, including where a bigger buffer pays.

A plant

How flow moves through it

Discrete rate simulation for high-speed and bulk flow, the method Andrew Siprelle created in 1990.

The supply chain

Where to make and ship

Network design and safety stock on the same engine, including tariff scenarios.

Open the free Sandbox How a project runs →
“We leveraged the model to recommend solutions that saved $21.7M in inventory carrying costs and reduced transit time by 19%.”
Mike Keller, Network Analyst & Engineer, Union Pacific Railroad

More customer quotes and 12 case studies →

Tools

ReliaSim is the main one; each of the others handles one kind of problem. Most have a free sandbox, and six also run inside AI assistants such as Claude and ChatGPT.

ReliaSimLines, plants, downtime data and supply chains SCModelingSupply network design, optimization and simulation GreenfieldFacility location and network design QueueSimQueueing and staffing, free sandbox QSimHealthEmergency department staffing Decoupling SimulatorDecoupling strategies for flaked product lines Adaptive CoachingReal-time operator guidance

All tools →

Podcast

In “How data-based simulations find the fastest wins,” Tom Lange and Andrew Siprelle talk about the paradox of averages, and why your Pareto can point you at the wrong failures.

Tell us about your problem

A line that won’t hit its number, say, or a network decision coming up. Tell us what you’re up against and a person will get back to you.

Rather talk now? Schedule a call.