Final answer:
The claim that purchasing software is the first step in architecting a SIEM system is false as initial steps involve assessing security needs and planning the SIEM architecture.
Step-by-step explanation:
The statement that the first step to architecting a SIEM (Security Information and Event Management) system is purchasing the software is false. The initial steps in designing a SIEM solution involve a thorough assessment of the organization's security needs, defining the scope and objectives, and planning the architecture to meet those requirements. It's essential to understand the current infrastructure, the volume of data to be monitored, compliance requirements, and the specific use-cases that the SIEM will address before selecting a software. Only after these steps are carefully considered, can the organization proceed to evaluate and purchase the appropriate SIEM software.