Final answer:
The four key assumptions for laying out high-volume, low-variety production systems are product and process standardization, high production volume, low product variety, and consistent demand, which lead to efficient, mechanized environments for creating identical products.
Step-by-step explanation:
The four assumptions (or preconditions) of establishing layout for high-volume, low-variety products are:
- Standardization of product and process sequence
- High volume of production
- Low variety of products
- Predictable and stable demand for the product
These assumptions imply that the production process is geared towards efficiency and consistency, focusing on a mechanized work environment where identical products are produced repeatedly. The high volume allows for the cost-saving benefits of economies of scale, while the low variety minimizes the complexity and variability in the production process, leading to a streamlined operation.