Hello. You really cannot accurately "batch number" with a "continuous process" because there will always be overlap from one batch to another batch during the manufacturing process. One of the most common ways to manage batch numbering in a continuous process is by using a "time stamp" both when raw material lot numbers change and for identification on each of the finished units as they are packaged. For example, when a raw material lot number gets changed, the exact "time" of day that this happens should be documented on the production recipe for the product being manufactured. For example: " At 11:00 am we changed to Lot Number XXX for ingredient Dehydrated Potato Flakes". Then, assuming that you can also print a Time Stamp on each package or case of produced product, you can "associate" the two together. So if you know that you changed to a new lot number of Flakes at 11:00 am, you then will know that all finished product that is time stamped after 11:00 am as well will start to have this "new lot" of material in it. Obviously, the point at which this new lot number of the ingredient actually ends up in the final product depends on how long it takes for the new lot of material to actually get into the system. But this can be "theoretically calculated" based on the production throughput for each ingredient in the recipe. I hope this helps.