1. 1. Expert judgment; 2. Meeting
2. 1. Interview; 2. Focus group; 3. Facilitated seminar; 4. Group innovation techniques (brainstorming, nominal group, Delphi, mind map, affinity diagram, multi-criteria decision analysis); 5. Group Decision-making technology; 6. Questionnaire survey; 7. Observation; 8. Prototype method; 9. Benchmark comparison; 10. System interaction diagram; 11. Document analysis
3. 1. Expert judgment; 2. Product analysis; 3. Alternative generation; 4. Guided seminars
4. 1. Decomposition; 2. Expert judgment
5. 1. Inspection (review, product review, audit, walk-through, inspection); 2. Group thinking technology