EffectsGroup Priority Standard Values
The order of execution of EffectsGroups is determined primarily by their specified Priority, and secondarily by their cause/source. A number of standard reference Priority values are specified in default\scripting\common\priorities.macros
Probably the largest and most complex set of interrelated EffectsGroups is that for various Population Effects, whose relative priority is critical to their proper operation. For reference, the current (as of this writing) order of their application is summarized below.
Growth Special/Focus Temporal_Anomaly_Special Con_Ndim_Strc Gro_Cyborg Con_Orbital_Hab Gro_Planet_Ecol Gro_Subter_Hab Gro_Symbiotic_Bio Gro_Xeno_Genetics Gro_Xeno_Hybrids
Planet environment = Uninhabitable
Planet environment = Hostile, Poor, Good
Planet environment = Adequate Gaseous_Bonus Bad_Population Lifecycle_Manip_Population_Effects
Homeworld_Bonus_Population Self_Sustaining_Bonus Homeworld_Growth_Focus_Boost