1 00:00:00,110 --> 00:00:03,580 The second question I want to ask you is which model is the most suitable if you 2 00:00:03,580 --> 00:00:06,660 expect mid-course corrections? Would you rather use a 3 00:00:06,660 --> 00:00:10,430 pure waterfall model, a spiral model, or evolutionary prototyping?