Three rules for sorting through measures:

1. If it is a financial indicator – it can never be a KPI
2. If the time period is longer than a week -it can never be a KPI
3. If you cannot phone someone to accept responsibility for performance – it is not a KPI as it is a result indicator, a measures of teams working together

Source: Extracted from

Key Performance Indicators – developing, implementing and using winning KPIs (4th Edition)