Planned Builds let you build items from components in steps, Planned and Completed.
Saving new Builds as Planned lets Big Business show what you need to buy for builds.
Planned Builds are new in Big Business 14 and part of Free MRP or Full MRP option. Free MRP works in all Editions setting Allocations of Items to show you planned use.
Full MRP works in Open and Built Editions to show you Released Orders and Builds.