What would NOT be a concern when developing behavior-based assumptions?

When developing behavior-based assumptions, the primary focus is on understanding how customers will interact with the product and the motivations behind their choices. This involves examining the ways in which customers will use the product, their reasons for selecting a particular solution, and how their behavior aligns with the product's intended use. These aspects are crucial for ensuring that the product meets user needs and expectations.

Return on investment is often a financial or business metric that evaluates the profitability of a project, rather than directly addressing customer behavior or product interaction. While it is certainly important to consider financial implications in product development, it does not fundamentally relate to the understanding of user behavior, thus making it less relevant in the context of developing behavior-based assumptions.