Understandably, managing any design or creative projects requires a clearly defined and followed methodology. For complex tasks the project manager must be vigilant and detailed. This is not to say you need to be 'hands-on' and constantly interfering - absolutely not - creative people need to be given freedom to use their abilities or you might as well ask an accountant to do the job (no offense to accountants). However, you as project manager - or the client - need to allow for and anticipate everything that can arise. The key to this is establishing clear positive open communications at the outset, and then maintaining full mutual understanding at all times, irrespective of how much freedom is delegated.