Guide des ratios de science Factorio : packs, objectifs SPM et goulots
Les ratios de science Factorio aident à convertir un objectif de recherche en assembleuses, fonderies, pétrole, circuits, convoyeurs et énergie. Utilisez cette page lorsque vous connaissez votre objectif de science, mais que vous avez besoin d’un cadre de planification plus clair.
Dernière mise à jour : 23 mai 2026. Pensé pour Factorio 2.0 et Space Age.
Réponse rapide : que sont les ratios de science Factorio ?
Les ratios de science sont les relations entre machines et ressources nécessaires pour maintenir un objectif de science packs. En pratique, la plupart des joueurs planifient par science par minute, puis remontent vers les intrants, les machines et le transport.
- Utilisez les ratios de science lorsque votre vraie question est comment tenir 60, 100, 250 ou 1000 SPM.
- Le ratio classique n’est qu’un point de départ, car les modules, les niveaux d’assembleuses et la logistique Space Age changent les nombres exacts.
- Un plan science échoue souvent parce que le pétrole, les circuits, la fonderie ou le débit des convoyeurs ne suivent pas les assembleuses visibles.
- Utilisez un calculateur en direct dès que le design inclut modules, balises, machines mixtes ou expéditions interplanétaires.
La planification de la science concerne toute l’usine
Un objectif de science paraît simple sur le papier, mais chaque SPM supplémentaire multiplie la demande en amont. Une chaîne pétrolière insuffisante, un manque de circuits rouges ou un convoyeur saturé peut casser tout le flux des laboratoires.
Commencez par un objectif de science, pas par un ratio mémorisé
The right planning question is not only “what is the ratio,” but “what research speed do I want to sustain?” SPM is the cleaner decision point because it matches how players budget factory scale.
| Target | Typical Use | Planning Impact |
|---|---|---|
| 60 SPM | Comfortable main-base progression | Small enough for clean belt-based layouts and easy debugging. |
| 100-250 SPM | Structured mid/late-game scaling | Oil, circuits, rail supply and power become more visible constraints. |
| 500-1000 SPM | Large optimized base | Beaconing, train throughput, UPS and logistics design matter more than memorized ratios. |
| Planet-specific SPM | Space Age expansion planning | Local production and interplanetary shipping can be the real bottleneck. |
Référence rapide des ratios de packs de science
For the classic pre-Space-Age science set, a common synchronized assembler ratio is shown below. It is useful as a cheat sheet, but only when the underlying machine assumptions remain consistent.
| Pack de science | Ratio relatif | Premier goulot habituel |
|---|---|---|
| Automation science | 5 | Usually easy; gears and copper are simple. |
| Logistic science | 6 | Inserters and belts raise early iron pressure. |
| Military science | 5 | Grenades, walls and piercing ammo can skew timing. |
| Chemical science | 12 | Oil processing and sulfur/plastic setup usually gate progress. |
| Production science | 7 | Rails, furnaces and productivity modules add bulk demand. |
| Utility science | 7 | Blue circuits, LDS and flying robot frames stress multiple systems at once. |
Recommended SPM Planning Workflow
Choisir un objectif SPM
Pick a clear target such as 60, 120 or 250 science per minute before placing machines.
Break science into upstream systems
Separate smelting, circuits, oil, low density structures, robot frames and modules so the real pressure points are visible.
Check machine counts and crafting speed
Assembler tier and module choice can change science output enough that a static table becomes inaccurate.
Check belts, pipes and trains
Many science designs fail because throughput and delivery lag behind the clean recipe math.
Recalculate after adding modules or Space Age systems
Productivity, beacons, quality and interplanetary shipping all change the effective science plan.
Où les bases science cassent le plus souvent
Oil underbuild
Chemical science, blue circuits and late-game packs often fail because refineries, cracking and petroleum support are too small.
Circuit shortages
Red and blue circuits become shared dependencies across multiple packs and infrastructure layers.
Transport saturation
A correct science ratio still fails when belts, trains, inserters or bots cannot sustain the item flow.
Power lag
Science expansions often look correct until modules, roboports and smelting push the grid into brownouts.
Les ratios de science Space Age demandent plus qu’un tableau fixe
Space Age changes science planning because the question is no longer only how many assemblers make each pack. Planet-specific recipes, logistics cadence, quality decisions and platform supply can all redefine the effective ratio.
| Space Age Factor | Why It Changes Science Math | Better Planning Habit |
|---|---|---|
| Planet-specific recipes | Each science chain may depend on a different production environment. | Solve the local chain first, then add transport. |
| Cargo rockets and platforms | Delivery timing can cap science before recipe output does. | Convert pack demand into shipment cadence. |
| Quality modules | Probability-based outputs shift machine requirements. | Plan quality goals separately from baseline science. |
| Power differences | Weak or unstable power can throttle a full science chain. | Check local power before scaling labs. |
Besoin d’un nombre exact de machines pour la science ?
Use the live Factorio calculator to translate SPM goals into assemblers, inputs, belts, modules and power requirements, then use this page to sanity-check the weak points.
FAQ des ratios de science Factorio
What is the classic Factorio science ratio?
A common classic reference is 5:6:5:12:7:7 for automation, logistic, military, chemical, production and utility science. Treat it as a quick guide, not a universal exact build.
Should I plan science by ratios or by SPM?
Plan by SPM first. Ratios help explain relationships, but science per minute is the clearer build target for machines, transport and power.
Why does my science setup stall even when the ratio looks correct?
The usual causes are oil shortages, red or blue circuit bottlenecks, saturated belts, train delays, insufficient power or module changes that were not recalculated.
Do modules change science ratios in Factorio?
Yes. Productivity modules, speed modules and beacon effects change effective output and ingredient demand, so machine counts should be recalculated.
Does Space Age change science ratio planning?
Yes. Space Age adds planets, logistics cadence, quality systems and new dependencies, so a static science table becomes only a starting point.
Sources and Further Reading
These references help verify science pack data, recipe relationships and calculator behavior.