Which planning strategy triggers in-house production of a subassembly before receiving a sales order?

The planning strategy that triggers in-house production of a subassembly before receiving a sales order is centered around the concept of ensuring that the necessary components are readily available for manufacturing completed goods. Planning at the assembly level focuses on organizing the production of subassemblies and components in anticipation of demand, rather than waiting for specific sales orders to be placed.

This proactive approach allows companies to streamline their manufacturing processes by reducing lead times and ensuring that production can proceed smoothly once a sales order is received. By initiating production of subassemblies before an order arrives, organizations can better manage inventory levels and respond to customer demands more effectively. This strategy is particularly useful in environments where demand is somewhat predictable, as it helps mitigate bottlenecks in the production process.

In contrast, the other options—such as gross requirements planning, planning without final assembly, and planning with final assembly—do not focus on the anticipatory production of subassemblies in the same way, which makes them less suitable for the described scenario.