Which of the following represents a "Level 1 (parametric optimization) design" change?

A "Level 1 (parametric optimization) design" change focuses on making enhancements within an existing framework rather than creating entirely new concepts or systems. In the context of product design, this often involves optimizing certain parameters of a product to improve its efficiency, performance, or sustainability without fundamentally altering its overall purpose or structure.

Creating a thinner walled plastic bottle exemplifies this concept, as it represents an optimization of the existing product by reducing material usage while maintaining functionality. This kind of change typically emphasizes aspects like weight reduction, cost savings, and resource efficiency, which are hallmarks of parametric optimization.

In contrast, creating a new product line involves developing entirely different products, which is beyond the scope of parametric adjustments to existing designs. Changing a packaging design completely implies a significant transformation that can impact the branding and functionality of the original product. Modifying distribution logistics focuses on the processes involved in getting a product to market rather than on the product itself, which does not fit within the framework of parametric design changes. Thus, the selection of creating a thinner walled plastic bottle accurately reflects the principles of Level 1 design change.