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