Which step involves capturing the sequencing and interactions of functions?

The correct response pertains to defining logical architecture, as this step is fundamentally focused on organizing and specifying how various functions within a system interact and relate to one another. Logical architecture emphasizes the arrangement of components in a way that illustrates their functional relationships and hierarchies, capturing how data and operations flow through the system. By outlining the functions and their interactions, system architects can ensure that the design effectively supports the desired functionalities and performance.

In contrast, evaluating Commercial Off-The-Shelf (COTS) solutions is primarily focused on assessing existing products for suitability, which does not directly involve the sequencing of functions. Partitioning system requirements refers to breaking down requirements into manageable sections but does not inherently address their interactions in a coherent sequence. Identifying interfaces and interactions deals with how different system components communicate and interface with one another. While it is an integral part of understanding interactions, it does not specifically account for organizing and sequencing the entire set of functions as part of a system’s logical architecture.