diff --git a/Stars Assistant/Model/Planet.cs b/Stars Assistant/Model/Planet.cs
index 3c6aced..68e7437 100644
--- a/Stars Assistant/Model/Planet.cs	
+++ b/Stars Assistant/Model/Planet.cs	
@@ -90,9 +90,19 @@ public class Planet
 
     #region Derived Properties
 
-    public int EffectiveValue => (Value == null) ? 0 : Math.Max((int)Value, MinEffectiveValue);
+    public static int EffectiveValue(int? value) {
+        if (value == null) return 0;
+        if (value < MinEffectiveValue) return MinEffectiveValue;
+        return (int) value;
+    }
 
-    public int MaxPopOnPlanet => Race.Player.MaxPopOnPlanet * EffectiveValue / 100;
+    public int EffectiveValue() => EffectiveValue(Value);
+
+    public static int MaxPopOnPlanet (int? value) {
+        return Race.Player.MaxPopOnPlanet * EffectiveValue(value) / 100;
+    }
+
+    public int MaxPopOnPlanet() => MaxPopOnPlanet(Value);
 
     public int PopGrowth(int currentPop, int maxPop, int value) {
         // What to do with non player races?
@@ -112,7 +122,62 @@ public class Planet
         return growth / 100 * 100;
     }
 
-    public int PopGrowth() => PopGrowth(Population ?? 0, MaxPopOnPlanet, Value ?? 0);
+    public int PopGrowth() => PopGrowth(Population ?? 0, MaxPopOnPlanet(), Value ?? 0);
+
+    public int MaxFact(int currentPop) {
+        int effectivePop = Math.Min(currentPop, MaxPopOnPlanet());
+        double tmp = (double) effectivePop / 10000 * Race.Player.FactoryNumberPer10k ?? 0;
+        return (int) tmp;
+    }
+
+    public int MaxFact() => MaxFact(Population ?? 0);
+
+    public int MaxMines(int currentPop) {
+        int effectivePop = Math.Min(currentPop, MaxPopOnPlanet());
+        double tmp = (double) effectivePop / 10000 * Race.Player.MineNumberPer10k ?? 0;
+        return (int) tmp;
+    }
+
+    public int MaxMines() => MaxMines(Population ?? 0);
+
+    public static int ResourcesFromPop(int currentPop, int value) {
+        if (Race.Player.ColonistsPerResource == null
+            || Race.Player.ColonistsPerResource == 0) 
+        {
+            return 0;
+        }
+        
+        int maxPop = MaxPopOnPlanet(value);
+        int popFullEfficiency = 0;
+        int popHalfEfficiency = 0;
+        if (currentPop <= maxPop) {
+            popFullEfficiency = currentPop;
+        }
+        else if (currentPop <= 3 * maxPop) {
+            popFullEfficiency = maxPop;
+            popHalfEfficiency = currentPop - maxPop;
+        }
+        else {
+            popFullEfficiency = maxPop;
+            popHalfEfficiency = 2 * maxPop;
+        }
+        int popEffective = popFullEfficiency + (popHalfEfficiency / 2);
+        return (popEffective / Race.Player.ColonistsPerResource) ?? 0;
+    }
+
+    public int ResourcesFromPop() => ResourcesFromPop(Population ?? 0, Value ?? 0);
+
+    public static int ResourcesFromFact(int currentPop, int factories, int value) {
+        int maxPop = MaxPopOnPlanet(value);
+        int effectivePop = Math.Min(currentPop, maxPop);
+        double tmp = (double) effectivePop / 10000 * Race.Player.FactoryNumberPer10k ?? 0;
+        int maxOperableFactories = (int) tmp;
+        int operableFactories = Math.Min(factories, maxOperableFactories);
+        tmp = (double) operableFactories / 10 * Race.Player.FactoryResPer10 ?? 0;
+        return (int) tmp;
+    }
+
+    public int ResourcesFromFact() => ResourcesFromFact(Population ?? 0, Factories ?? 0, Value ?? 0);
 
     #endregion