3 to 6 weeks for medium-sized events (100 to 300 visitors), depending on ambition and approval cycle. Phase 1: brief (1 week). Phase 2: idea generation (1 to 2 weeks). Phase 3: presentation and refinement (1 to 2 weeks). Complex events such as festivals or multi-day programmes, or consensus organisations, deserve 8 to 12 weeks. Starting faster is possible, but that weakens the exploratory process. Live Impact works in short cycles: iteration is more efficient than haste.