The most likely cause of the misunderstanding regarding the purchase of a harmful cleaning product by the facilities management team is that the project goals for health and well-being were overlooked during the initial discussion with the team. Effective communication and clear documentation of health and well-being goals, including the selection of less hazardous cleaning products and the establishment of adequate cleaning protocols, are crucial to ensuring that all team members are aligned and informed. The lack of awareness and understanding of the cleaning plan by the facilities management team indicates a gap in communication and documentation, underscoring the importance of integrating health and well-being goals into all aspects of project planning and execution.