Using conceptual design modeling is a huge time saver. It allows you to create large structures in a short amount of time. Using the masses helps to create abstract shapes that would be difficult creating any other way. Lastly, most skyscrapers use a symmetrical layout on each floor to create a sturdy foundation and to make the design process easier, which is why using masses is so useful. Using masses gives the architect the ability to quickly replicate a floor layout on a different level, saving a lot of time.

When is it needed/appropriate? And when not?

For example, should you create a conceptual mass model of a small house?

Please post and share images of these examples to this Notion page.

This building in Nagoya, Japan most likely used conceptual mass models due to its curved walls and curtain wall systems. It has a very abstract shape.