1. Introduction  
2. Hi-GAL Observing Strategy  
2.1. Detection of compact sources  
2.2. Detection of extended structures  
2.3. Checks on photometric calibration  
3.1. The Distribution of the ISM Temperature and the Intensity of the Interstellar Radiation Field  
3.2. Molecular cloud formation  
3.3. Timeline of high-mass star formation  
3.4. Bridging the Gap between Global and local star formation  
3.5. Serendipitous Science  
4. Hi-GAL and its Place in the Context of the Multi-Wavelength Milky Way  
5. Data Processing and Products  
6. Conclusions