Understanding what your system truly demands is the foundation of any great biometric or token-based authentication. What are your system's pain points, and how do authentication methods solve them? Identify the mandatory criteria and desired features. This task focuses on laying the groundwork for everything that follows. Will it cater to employees, customers, or both? Delve into the details and foresee challenges that may arise from user diversity, or perhaps system scaling issues. Resources needed include access to the current system architecture and stakeholder inputs.