You can run a pre-brew stock by going to Production -> Actions -> Pre-brew stock check. This tool will check all your planned batches (and ad-hoc additions) to see if you have the required stock items to brew them.

If you are missing any items that you need, you can get Breww to automatically generate the required Purchase Orders (POs) to ensure this stock is ordered and delivered to you in time.

Having run your pre-brew stock check, simply click the Generate POs for missing stock button above the results.

You'll have to option to choose which supplier should be used for each item (with Breww defaulting sensibly for you). Breww will also round the quantity up to multiples of your supplier's pack size and ensure it is above the minimum order quantity for that supplier.

Breww will then generate a summary for you to confirm. Just click Create POs and your draft POs will be automatically created. Once you've reviewed them and made any manual adjustments (for example to purchase something extra), you can confirm and send them to your suppliers.