• Scales (eg Performance, Attitude, Quality of work etc)
• Verbal descriptions (more qualitative, less quantitative, less formal)
• 360 degree feedback
• Forced distribution (15% lowest, 20% low, 35% average...)

GE, Microsoft, some other IT companies copied forced distribution

Critisism: Forced Ranking causes lower productivity, skeptisism, mistrust and in general: Fight between co-workers.