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What did we learn
Users like stable and maintained systems
It takes time to develop a new system
- Geant3 6+ years 3 people 300 KLOCs
- PAW 6+ years 5 people 300
- Zebra 4+ years 2 people 100
- ROOT 5* years 3 people 630
- For all these systems we could show a working system after 1 year. Real work is after !!
Notes: