Lower cost does not mean better value. Higher cost does not always imply better quality. Nor does higher quality automatically benefit users or increase value. So, while building costs can be estimated in various ways, Value Engineering analysis also assesses them against benefits and compares alternative means to the same end.
Doing this, it's beneficial to be unhindered by traditional professional demarcation. Projexasia conduct Value Engineering exercises on many building types, for various members of the construction team and concerning building parts or trades, as well as complete projects.