History-based models often break when you change an early feature. Synchronous avoids this by using localized face manipulation and live rules. Move a boss from one hole to another; the fillets follow. Change a key dimension; the model adapts instantly. No gray error dialogs, no hunting for failed children.
Recreate the part from scratch or attempt a series of offset faces and hoped‑for regenerations. solid edge synchronous
Synchronous models don’t require a long feature tree full of sketches, extrudes, cuts, and mirrors. You still can use ordered (history-based) features when you want them, but Synchronous lets you design without building a towering dependency chain. Real-World Example A manufacturer receives a customer’s legacy STEP file for a cast housing. The customer suddenly needs the four mounting pads moved outward by 12 mm and the central bore increased from 50 to 58 mm. History-based models often break when you change an