1 Introduction  
2 Estimations of theoretical uncertainties  
2.1 Uncertainty estimation by scale variation  
2.2 The Cacciari-Houdeau Bayesian approach  
2.3 The modified Cacciari-Houdeau approach  
3 Global survey  
3.1 Setup  
3.2 Results  
4 Benchmark processes  
4.1 Processes without hadrons in the initial state  
4.2 Processes with hadrons in the initial state  
5 Conclusions and outlook