Selection of the Most Effective Deliverables in the Sustainability of the Product Design and Development Process Group Employing Hybrid Delphi-GAHP and COCOSO Method

Over the past decade, establishing sustainability has become the center stage in manufacturing products as most elements of sustainability meaning economic, social and environmental pillars are improving. However, developing processes leading to product sustainability throughout its life cycle, especially in the new product development process groups, is still in its infancy. The present study focuses on ranking the product development process groups and identifying the most effective one in product sustainability through Delphi-GAHP and COCOSO methods. To carry out this task, product life cycle, the main new product design and development process groups, gateway planning, deliverable items, and product sustainability pillars have been introduced and the necessary data has been collected with the help of automotive industry experts. The most effective process group in product sustainability was selected and the deliverables in the selected process group were ranked to isolate the most effective deliverable item in product life cycle sustainability. Based on the research findings, the product planning and definition process group has the highest rating score and the ability to create sustainability pillars with the highest effectiveness in sustainable end product development. In addition, this study showed that the development and application of sustainability components in one of the deliverables of this process group (target book) has the greatest impact on creating sustainability at different stages of the product life cycle. Evidently in future research, the findings of this study can be employed in establishing sustainability in product development processes by developing the attributes and components of this new deliverable item.