Answer:
Let's say that the product is basic ibuprofen (Advil) pills. Since the product belongs to the pharmaceutical industry, it is required to have structured and often quality checks. Also, the product's structure or recipe can be easily changed by demanding guidelines (FDA). What's more, defects are very common if a certain substance goes over (or below) the required percent in the process.
Batch production is the best production method to use here, as it is basically production in groups (batches), where frequent control is provided. Also, in the case of a potential recall, it is easy to map the troublesome batch (due to the documentation, used materials and ingredients etc.).