Lean and agile methods are approaches that focus on delivering value to the customer by eliminating waste and improving efficiency and flexibility in the product development process. Lean methods aim to reduce the amount of resources, time, and effort required to produce a product, by identifying and eliminating non-value-added activities, such as overproduction, inventory, waiting, transportation, motion, overprocessing, and defects. Agile methods aim to increase the responsiveness and adaptability of the product development process, by breaking down the project into smaller and more manageable iterations, involving frequent feedback and collaboration from the customer and other stakeholders, and embracing change and experimentation. By applying lean and agile methods, you can simplify your product design and cut costs by focusing on the essential features and functions that meet the customer's needs and expectations, and by avoiding unnecessary or excessive work.