Choose the next useful investment.
Skie Field Manual · Evidence reviewed 9 November 2026. Read the linked reference for formulas, sources and version limits; current account settings remain the final check.

This guide covers:
- Read the bottleneck in your own resource screen.
- Compare two upgrades using incremental output.
- Keep storage, energy and transport ahead of production.

Know what each mine does

Mines provide recurring Metal, Crystal and Deuterium while power and storage permit. Compare the next level’s additional output, not the planet’s total income. Temperature, position and active bonuses can change the useful choice.

Details and worked examples
https://theilluminate92.github.io/skie-guides/guide-economy-roi.html#mine-basics

Early production and infrastructure

Early growth needs both production and the facilities for a useful unlock. Fund the missing resource and its supporting power rather than copying a fixed mine ratio. The detailed reference keeps the first-planet checklist.

Details and worked examples
https://theilluminate92.github.io/skie-guides/guide-economy-roi.html#first-session

Measure before you spend

Read current production, power, storage and fields on each candidate planet. Keep the same class, universe speed and active bonuses in both sides of a comparison. A shortage of power or collection capacity is not solved by another mine.

Details and worked examples
https://theilluminate92.github.io/skie-guides/guide-economy-roi.html#audit

Name the next constraint

The limiting resource is the one that delays the intended purchase longest. Use current stock and reliable net production, then include deliveries at their actual arrival times. Reserve flight fuel and check infrastructure before spending.

Details and worked examples
https://theilluminate92.github.io/skie-guides/guide-economy-roi.html#bottleneck

Compare the complete investment

Simple payback divides the complete project cost by its extra net income. Include supporting power and operating fuel, use consistent resource values, and compare across planets. A shorter payback can still lose to an urgent unlock or resource constraint.

Details and worked examples
https://theilluminate92.github.io/skie-guides/guide-economy-roi.html#compare

Make the offline interval affordable

Current stock plus production during your absence is an unconstrained forecast. A full store stops further mine accumulation. Price storage against production actually saved, and include known deliveries and spending separately. More storage does not make a stockpile safe.

Details and worked examples
https://theilluminate92.github.io/skie-guides/guide-economy-roi.html#storage

Verify the result

After completion, compare actual output under the same settings. Check energy, storage, production sliders and bonus expiry if the gain differs. Keep one funded improvement, one next target and enough reserves to protect the operation.

Details and worked examples
https://theilluminate92.github.io/skie-guides/guide-economy-roi.html#review

Detailed reference

Mine costs, incremental output, resource bottlenecks and the storage you will actually use.

Compare the change, not the total
https://theilluminate92.github.io/skie-guides/guide-economy-roi.html#compare-the-change-not-the-total

A real baseline mine comparison
https://theilluminate92.github.io/skie-guides/guide-economy-roi.html#a-real-baseline-mine-comparison

Find the actual waiting-time bottleneck
https://theilluminate92.github.io/skie-guides/guide-economy-roi.html#find-the-actual-waiting-time-bottleneck

Value the storage you will actually use
https://theilluminate92.github.io/skie-guides/guide-economy-roi.html#value-the-storage-you-will-actually-use

Quick checks:
- I know my next resource bottleneck.
- The upgrade includes its energy and infrastructure cost.
- Storage covers my planned absence.
- Fleet fuel and cargo are reserved.
- I will verify the actual production increase.

Sources:
Buildings tutorial · official forum archive, 2019; core mechanics only
https://board.en.ogame.gameforge.com/index.php?thread/813417-tutorial-02-buildings/=

Formula Thread v3 · unmodified mine terms; exclude obsolete unrelated sections
https://board.en.ogame.gameforge.com/index.php?thread/548906-formula-thread-v3/=

Skie v1.6.1 · reviewed 2026-11-09