Assessing Sustainable Metal Alternatives: A Feasibility Study for NTS Hengelo

This thesis presents a structured decision-making framework to support NTS Hengelo in identifying the most suitable sustainable metal alternatives to replace at least 4% of its current metal usage. The study integrates sustainability, cost, and supplier-related criteria using the Analytic Hierarchy Process (AHP) to evaluate six candidate metals, including recycled aluminium, green steel, and secondary stainless steels. The methodology combines quantitative data from literature, industry databases, and environmental reports, normalized into AHP inputs. A dynamic Excel dashboard was developed to enable scenario analysis and support transparent trade-off decisions. Results indicate that recycled aluminium 6082 offers the most feasible path for short-term adoption due to its high sustainability rating and significant usage volume within the company. While aluminium 6061 scored highest overall, its low internal use reduces implementation impact. The model proves to be a practical tool for aligning procurement with EU sustainability targets and corporate priorities.