The five ratios
Five ratios summarize a ledger. Each is printed with its meter point and an arrow for which direction is better, because mixed-direction scorecards are easy to misread.
Formulas and directions
| Ratio | Formula | Better |
|---|---|---|
| Decision Yield | DY(Mx) = Npass / E(Mx) | Higher |
| Overhead Ratio | OR = E(M4) / E(M3) | Lower (≥ 1) |
| Landauer Gap | LG = Eper erasure / (kB·T·ln 2) | Lower (≥ 1) |
| Energy Return | ER = Edelivered / (Econstruction + Eoperation + Edecommissioning) | Higher |
| Autonomy | A = Twithout intake / Tmission | Higher |
How values are written
Every value carries its meter point and direction, for example "OR(M4/M3) ↓ 1.12" or "DY(M3) ↑ 2,449 decisions per kWh". A value without its meter point is incomplete.
Autonomy
Autonomy is the share of a mission a system can complete without new intake, with endurance (usable reserve divided by mean power drain) as a secondary measure. It has no published precedent, so the mission profile must be versioned and stated.
Questions
Is a single efficiency score possible?
Not honestly. The ratios measure different things in different directions; combining them would hide exactly what a buyer needs to see.
Keep reading
Take the next step.
The five JL-26 ratios: Decision Yield, Overhead Ratio, Landauer Gap, Energy Return and Autonomy, with their formulas, units and which direction is better.