1) The document discusses Nilfisk's experience with Net Promoter Score (NPS) as a metric to measure customer satisfaction and loyalty over time.
2) Initial challenges included low response rates to surveys and a lack of engagement across the organization. Actions taken focused on improving communication to customers and internal training.
3) By integrating NPS into key processes and communicating results regularly, it became a core business metric that influenced strategy and identified areas for structural change based on customer feedback.