Multilevel Build is a custom function to automate multilevel builds to ensure accuracy.
Subassemblies help simplify your builds by creating built components you can add in. Mass producing subassemblies lets you use Auto-Build when invoicing special builds.
When subassemblies are not pre-built you need to enter Builds for subassemblies, then special builds that use subassemblies. Multilevel Build does this for you in one Build.