If you need an Inventory Manager with Multi Level BOM capability but don't want the bother and associated running costs of an oversized ERP/MRP system then there's a good chance that miniMrp is all the software you're looking for.
miniMrp includes purchasing, customer orders, work orders, multi level bills of material, shortage forecasting and many other MRP-Like features in an easy-to-use Inventory Manager costing less than $200 per user.
Take your free trial right now and see for yourself.
The trial version is fully functional - Enter as much real data as you want - any data you create during your trial is not lost once you purchase the fully licensed software.
miniMRP may look like a small package but that's because it doesn't waste space on the features that nobody uses anyway.