A software program for use in designing interior and exterior spaces receives user input that is associated with one or more attributes. Subsequent user input, having other attributes, is resolved in light of the first input attributes to create a real-world depiction of design choices in real-time. For example, design choices that conflict with prior design choices are resolved (or modified as necessary) to ensure that each of the prior and present user input choices are represented in an appropriate way. The resolution by the design software is also used to create an accurate parts (and/or price) list so that when the user has completed the design of an exterior or interior space, the design can be submitted directly as an order to be fulfilled. Generally, continual resolution ensures that the user's design intent is captured in an accurate and efficient way in a user interface.