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State of Supply Chain sustainability 2021 MIT report
https://sscs.mit.edu/wp-content/uploads/2021/07/State-Sustainable-Supply-Chains-MIT-CSCMP.pdf
This year's report sheds light on how companies put their SCS promises into practice. Of the many ways to accomplish this, three common approaches emerged, including supplier development, supply chain visibility, and environmental impact reduction. Supplier development was the most common across all industries; however, visibility proved equally attractive in manufacturing and transportation.

As the supply chain sustainability field advances, so does this report, and this year we introduce a classification of companies based on behaviors related to SCS. The model, called the SCS Firm Typology, yields fresh insights into the state of sustainability in supply chains. Categories of firms range from low? effort enterprises with little engagement in SCS to highly committed leaders. This typology distills the report's analyses into an interpretable model and enables future exploration of the evolution of SCS across multiple dimensions.