| 1. | The earliest stages of high-mass star formation: Initial conditions and early collapse | |
| a. | Structure, kinematics and turbulence from molecular clouds to star-forming cores. | |
| b. | Do high-mass starless cores exist? What are the youngest massive protostars? | |
| 2. | Properties and evolution of massive protostars | |
| a. | Theoretical massive star formation models | |
| b. | Observational constraints | |
| c. | How does matter accrete onto massive protostars? Does accretion change the protostellar properties (e.g., spectral classifications)? | |
| d. | Toward an evolutionary sequence in OB star formation, correlating theoretical and observational evolutionary stages | |
| 3. | Clustered massive star formation | |
| a. | Massive protobinaries and small clusters | |
| b. | Orion revisited | |
| c. | Nearby clusters and molecular complexes | |
| d. | Starburst clusters in the Galaxy and the Galactic center | |
| 4. | Feedback (outflows, turbulence, dust and gas bubbles, ionization) | |
| 5. | Massive Star Formation in a Galactic Context | |
| a. | Major results from recent/current/future Galactic surveys | |
| a. | Distribution and distances of massive star-forming regions - tracing the spiral arms of the Milky Way | |
| 6. | Extragalactic star formation | |
| a. | Resolved Massive SF in extragalactic systems | |
| b. | Massive Star Formation at high redshifts | |
| 7. | Future perspectives for observational, theoretical and modeling tools | |