Nowadays, sustainability has become a requirement for textile companies to remain long-term competitive. “Pandora” is a software tool that enables a systematic approach to quantify sustainability by a ranking system. Pandora can evaluate fibre material and textile technology within various scenarios or company profiles in order to recommend the most suitable substitution customized to the vision, demands, and prioritization of the user. Therefore, the software can support decision-making processes towards transparent and sustainable longterm planning of businesses. Pandora was successfully implemented in a case-based approach for the replacement of a cotton-polyester tent fabric for a Dutch company.