Organisational Network Analysis is a diagnostic tool that provides a unique "x-ray" view into how work actually gets done in an organization. It is based on input from employees to map relationships and analyze collaboration networks. This data-driven approach provides fast insights that are readily accepted by staff and easily translate into decisions and actions to improve organizational performance. Key interventions can be identified to redefine roles, incentives, and resources allocation. Executives from Novo Nordisk and Columbus IT found it to be a valuable tool for organizational audits, change initiatives, and strategic planning.