This research paper aims to understand lean-sustainability enablers, criteria, and attributes in the pottery industry and develop an assessment framework for lean sustainability. For this framework, a multi-grade fuzzy approach and importance-performance analysis are used. The case study has been conducted at the case pottery unit located in India. The lean-sustainability index value for the case pottery unit is 8.01, which belongs to the ‘very highly lean-sustainable practices’ level. The identified weaker attributes for the case-pottery unit are supplier readiness and maintenance. Suggestions are provided to improve the weaker attributes. The developed framework helps pottery unit managers to improve their lean-sustainability practices.