How it works
Expand beyond the first rocket without losing visibility into production bottlenecks. Each stage in the walkthrough below has a distinct practical objective; complete the current supply or control loop before expanding it.
Practical advice
Define a long-term output such as a science production target rather than copying an arbitrarily large city-block layout.
Mistakes to avoid
Never assume an unrelated blueprint or another version of Factorio has identical recipes, technology unlocks or machine ratios. Use the checkpoints in this guide to diagnose your own save.
Mega-factory performance and scaling: complete walkthrough
Choose a sustainable objective
Define a long-term output such as a science production target rather than copying an arbitrarily large city-block layout.
Profile consumption
Use the production statistics, power graph and real traffic to find what prevents reaching the target.
Standardize modules
Make train station names, interfaces, ore unloading and power routing consistent so duplicated blocks behave predictably.
Consider simulation cost
Large robot swarms, unnecessary fluid networks and overly complicated circuits can cost management time and performance. Measure actual impact before changing architecture.
Scale in verified increments
Copy one tested block and remeasure output after each increase. Avoid adding thousands of assemblers to a factory that still has one-starved ore belt.