First of all, as you model, you can assign lot and phases to the AdvanceSteel objects. You can also do a mass selection of your model and assign a phase to it. This will help isolate that phase when numbering time comes. When you do number the model, select one phase at a time. Each phase can have a seperate start. For exemple, Phase 1 can have Process single part star at 1000 and assemblies start at 100, Phase 2 can have Process single part star at 2000 and assemblies start at 200etc... Effectively identifying different parts of your model to a specific phase will also allow lists and drawings to be generated for these particular phases more easily.