The transformation process implies the conversion of inputs (resources) into outputs (goods and services), including physical (tangible) goods as well as intangible products (such as services).
In the case of a grocery store, resources can be turned into outputs through processes such as unpacking and placing physical goods on shelves, making them ready to be handled and purchased by customers. Additionally, grocery stores may make food products themselves. In that case, a more basic transformation process applies, such as the conversion of food ingredients (resources/input) into a finished food product (finished good/output) to be sold to customers.
Services can include delivery and pick-up services (particularly with companies such as Woolworths) and can also be considered part of the transformation process. In such a case, goods that have been ordered by a customer can be considered inputs as the grocery store needs to get them ready to either deliver them to the customer or have the customer come pick them up from the store. The goods can be considered outputs when the customer successfully picks them up or when the grocery store successfully delivers them to the customer.