The paper discusses the basic problems of ergonomic engineering and quality engineering, specific to the defined phases of the life cycle of technical products (LCA). The range of technical products was limited to machines, hand tools and equipment used to implement basic technologies in the construction and operation of machines. The relationship between the ergonomic and quality issues in the identified phases of the product life cycle was presented. Attention was paid to overgeneralization (in the ergonomic and ecological context) in the product’s decommissioning phase. It is important to highlight the significance of the relationship between ergonomics and quality, and economic and ecological issues (such as the 3R strategy), which should be included in all of the phases of the product’s life cycle.