Final answer:
The correct answer is option 4: d. The variety of outputs.
Step-by-step explanation:
The similarity between process focus and mass-customization is the variety of outputs. Both process focus and mass-customization involve producing a wide range of products with different characteristics.
In process focus, the focus is on producing a variety of products in small batches or customized to meet specific customer requirements. For example, a bakery that offers different types of bread and pastries.
In mass-customization, the focus is on producing customized products on a large scale. This is achieved by combining standardized modules or components to create unique variations of a product. An example is a computer manufacturer that allows customers to choose different specifications for their computers.