Treat a Big Ambitions factory as a supply system rather than a single building. The Steam description confirms that the game can grow from small businesses into larger corporations and that products may be imported through the harbor and distributed through warehouses. A factory plan should therefore answer what is produced, where inputs come from and how finished goods reach the businesses that sell them.
Plan the chain before buying capacity
Start with the destination business and work backward. Identify the stock it needs, decide whether you will buy or produce that stock, then map storage and transport. Only after the chain is clear should you spend on additional equipment or space. This prevents a factory from becoming an expensive isolated asset.
Use the store equipment guide for setup records and the warehouse guide for distribution planning. Exact production rates, item recipes and margins are not stated on the official store page, so they should be marked needs-testing until confirmed in the current build.
Factory expansion checks
Before expanding, check whether the current bottleneck is production, storage, transport or demand. Adding production to a full warehouse does not increase useful sales. Likewise, a bigger facility is not automatically profitable if the downstream storefront cannot consume its output.