Product Sustainability Index (<i>ProdSI</i> )
As a result of the rapidly depleting global resources, continuing climate change and increasing environmental pollution, and the associated growth in customer awareness, improving product sustainability has become a global trend. Comprehensive sustainability assessment techniques are needed to assess a product's sustainability performance throughout its entire life cycle. This article presents the Product Sustainability Index (ProdSI) methodology and its application. This methodology is metrics based and provides a comprehensive assessment of the overall product sustainability throughout its total life cycle, covering the four life cycle stages: pre-manufacturing; manufacturing; use; and postuse. In this article, first the fundamentals of sustainable manufacturing and product sustainability assessment (PSA) are presented, followed by a review of existing PSA methodologies. Major product sustainability elements that are used to define product sustainability clusters and individual sustainability metrics are then presented. Finally, the ProdSI methodology for PSA, which follows a hierarchical approach for sustainability metrics identification and overall PSA, is introduced. The application of the methodology is demonstrated in a numerical example of ProdSI evaluation for two generations of a consumer electronics component.