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Docs reliability mtbf nerf (#135)
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* TEST

* TEST

* TEST

* TEST

* TEST

* Please review

* I found this one, this is weird, please also review

* line breaks

* Revert "line breaks"

This reverts commit be4568b.

* typo

* darn, a *.bak file ...

* Small addition
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@Gordon-Dry
Gordon-Dry authored and steamport committed Jul 13, 2018
1 parent b75814b commit 37b627e
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2 changes: 1 addition & 1 deletion GameData/Kerbalism/System/Reliability.cfg
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Original file line number Diff line number Diff line change
Expand Up @@ -747,7 +747,7 @@
mtbf = 72576000 // 8y
extra_cost = 1.0
extra_mass = 0.2
@extra_mass *= 0.2
// @extra_mass *= 0.2 // is this intended? Does it make sense?
}
}

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117 changes: 79 additions & 38 deletions docs/reliability.rst
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Expand Up @@ -37,41 +37,82 @@ Supported modules

The system can trigger failures on arbitrary modules in a part, using the Reliability module. This module is added automatically for most stock components.

+-----------------------------+-----------+----------+------------------+------------+------------+
| COMPONENT | MTBF (y) | REPAIR | REDUNDANCY | EXTRA COST | EXTRA MASS |
+=============================+===========+==========+==================+============+============+
| Solar Panel | 4 | Anyone | Power Generation | 2.5 | 1.0 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| Reaction Wheel (standalone) | 4 | Anyone | Attitude Control | 2.5 | 1.0 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| Reaction Wheel (pod) | 4 | Anyone | Attitude Control | 0.25 | 0.15 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| RCS | 8 | Engineer | | 2.0 | 1.0 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| Light | 4 | Anyone | | 5.0 | 1.0 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| Parachute | 8 | Anyone | Landing | 2.5 | 0.5 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| Engine | 8 | Engineer | Propulsion | 1.0 | 0.1 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| Radiator | 8 | Engineer | | 2.0 | 0.5 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| Resource Converter | 8 | Engineer | | 1.0 | 0.2 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| Resource Harvester | 8 | Engineer | | 1.0 | 0.2 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| Antenna | 8 | Anyone | Comms | 2.0 | 1.0 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| Treadmill (in Hitchiker) | 4 | Engineer | | 0.25 | 0.05 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| ECLSS | 8 | Anyone | Life Support | 2.5 | 0.1 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| Fuel Cell | 8 | Engineer | Power Generation | 1.0 | 0.5 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| Chemical Plant | 8 | Engineer | | 1.0 | 0.2 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| Crustal Harvester | 8 | Engineer | | 1.0 | 0.2 |
+-----------------------------+-----------+----------+------------------+------------+------------+
| Atmospheric Harvester | 8 | Engineer | | 1.0 | 0.5 |
+-----------------------------+-----------+----------+------------------+------------+------------+

+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| COMPONENT | MTBF std | MTBF high | REPAIR | REDUNDANCY | EXTRA COST | EXTRA MASS |
+=============================+===========+===========+==========+==================+============+============+
| Solar Panel (standalone) | 4 years | 16 years | Anyone | Power Generation | 2.5 | 1.0 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Solar Panel (embedded) | 4 years | 16 years | Anyone | Power Generation | 0.25 | 0.1 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Solar Panel (crewed) | 4 years | 16 years | Anyone | Power Generation | 0.125 | 0.05 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Reaction Wheel (standalone) | 4 years | 16 years | Anyone | Attitude Control | 2.0 | 1.0 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Reaction Wheel (embedded) | 4 years | 16 years | Anyone | Attitude Control | 0.25 | 0.15 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Reaction Wheel (crewed) | 4 years | 16 years | Anyone | Attitude Control | 0.2 | 0.05 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| RCS (standalone) | 8 years | 32 years | Engineer | Attitude Control | 2.0 | 1.0 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| RCS (embedded) | 8 years | 32 years | Engineer | Attitude Control | 0.2 | 0.1 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| RCS (crewed) | 8 years | 32 years | Engineer | Attitude Control | 0.1 | 0.05 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Light (standalone) | 4 years | 16 years | Anyone | | 5.0 | 1.0 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Light (embedded) | 4 years | 16 years | Anyone | | 0.1 | 0.05 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Light (crewed) | 4 years | 16 years | Anyone | | 0.05 | 0.01 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Parachute | 8 years | 32 years | Anyone | Landing | 2.5 | 0.5 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Engine | 8 years | 32 years | Engineer | Propulsion | 1.0 | 0.1 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Radiator* (standalone) | 8 years | 32 years | Engineer | | 1.0 | 0.25 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Radiator* (embedded) | 8 years | 32 years | Engineer | | 0.2 | 0.1 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Radiator* (crewed) | 8 years | 32 years | Engineer | | 0.1 | 0.05 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Resource Converter | 8 years | 32 years | Engineer | | 1.0 | 0.2 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Resource Harvester | 8 years | 32 years | Engineer | | 1.0 | 0.2 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Experiment (standalone) | 8 years | 32 years | Engineer | | 0.5 | 0.1 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Experiment (embedded) | 8 years | 32 years | Engineer | | 0.05 | 0.01 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Experiment (crewed) | 8 years | 32 years | Engineer | | 0.025 | 0.005 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Antenna (standalone) | 8 years | 32 years | Engineer | Comms | 1.0 | 0.1 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Antenna (embedded) | 8 years | 32 years | Engineer | Comms | 0.5 | 0.01 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Antenna (crewed) | 8 years | 32 years | Engineer | Comms | 0.05 | 0.001 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Treadmill (in Hitchhiker) | 4 years | 16 years | Engineer | | 0.1 | 0.05 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| ECLSS (standalone) | 8 years | 32 years | Anyone | Life Support | 2.5 | 0.1 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| ECLSS (crewed) | 8 years | 32 years | Anyone | Life Support | 0.625 | 0.025 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Fuel Cell | 8 years | 32 years | Engineer | Power Generation | 1.0 | 0.5 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Chemical Plant | 8 years | 32 years | Engineer | | 1.0 | 0.2 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Crustal Harvester | 8 years | 32 years | Engineer | | 1.0 | 0.2 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+
| Atmospheric Harvester | 8 years | 32 years | Engineer | | 1.0 | 0.5 |
+-----------------------------+-----------+-----------+----------+------------------+------------+------------+

*this is valid for each the "Radiator motor" and the "Radiator panel"
The above MTBF values are estimated average values and mostly are similar for standalone parts.
For modules which are embedded into bigger parts, like for example built in reaction wheels into crewed pods, the MTBF values can vary much more.
The MTBF depends of the mass of the part, or in case of an embedded module, a defined fraction of the part's mass.
Also the fact if a part has a crew capacity is taken into account.
To avoid weird numbers, the lowest possible MTBF is 4 years and the highest possible MTBF is 64 years.
As a rule of thumb we can say that heavier parts have a shorter MTBF as lighter parts.

The EXTRA COST and EXTRA MASS values define a multiplier of the part's original values.
So 0.1 means +10% and 2.5 means +250%.

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