What?
What the title says: Based on the cohorts feature, rebuild the current (and very much flawed) staff mood feature and its impact on an airline’s image.
Why?
Hopefully self-explanatory 
When?
Naturally, this requires the data/information made available by employee cohorts, but it would also make sense to tackle this in conjunction with or after some sort of redefinition of Brand and Image in AirlineSim.