What parameters must be considered when selecting the primary package for a product?

When selecting the primary package for a product, it is crucial to consider compatibility and safety as key parameters. Compatibility ensures that the packaging material does not react adversely with the product it holds, which could affect the product's quality and effectiveness. This is particularly important for pharmaceuticals, where the integrity of the product must be maintained throughout its shelf life. Safety is equally important; the packaging must protect the product from contamination and physical damage while also ensuring that it does not pose any risk to consumers.

In the context of this question, focusing on compatibility helps in determining if the packaging will preserve the product's characteristics, while safety focuses on the risks associated with the materials used and the protection offered by the packaging. While other parameters like volume, material specifics, and efficacy could also play a role in packaging decisions, they do not encompass the critical aspects of ensuring that what is inside the package remains effective and safe for consumers.