On that question I would also have to take into consideration how long it takes to manufacture the product the availability of materials and the skill of the engineers needed to complete the project.

Implementing a just-in-time (JIT) production approach, closely monitoring demand forecasts, and adjusting production schedules help align output with demand, reducing the risk of excess inventory.

Simple. Restock enough material for the full project. I really don’t like to deal with delayed projects, because of a low stock. Sometimes restocking might take longer because of manufacturing those items delayed by the sellers, so it is best if they know too, that you will order more than usually and have agreement to order in stack. You don’t need it all the same week/month but you might need them in the next few month and this way we can split the whole order.