title: Optimizing Eco-Efficiency Across the Procurement Portfolio.
abstract: Manufacturing organizations' environmental impacts are often attributable to processes in the firm's upstream supply chain. Environmentally preferable procurement (EPP) and the establishment of environmental purchasing criteria can potentially reduce these indirect impacts. Life-cycle assessment (LCA) can help identify the purchasing criteria that are most effective in reducing environmental impacts. However, the high costs of LCA and the problems associated with the comparability of results have limited efforts to integrate procurement performance with quantitative organizational environmental performance targets. Moreover, environmental purchasing criteria, when implemented, are often established on a product-by-product basis without consideration of other products in the procurement portfolio. We develop an approach that utilizes streamlined LCA methods, together with linear programming, to determine optimal portfolios of product impact-reduction opportunities under budget constraints. The approach is illustrated through a simulated breakfast cereal manufacturing firm procuring grain, containerboard boxes, plastic packaging, electricity, and industrial cleaning solutions. Results suggest that extending EPP decisions and resources to the portfolio level, recently made feasible through the methods illustrated herein, can provide substantially greater CO2e and water-depletion reductions per dollar spend than a product-by-product approach, creating opportunities for procurement organizations to participate in firm-wide environmental impact reduction targets.
authors.affiliation: NorthStar Initiative for Sustainable Enterprise, Institute on the Environment, University of Minnesota , 325 Learning and Environmental Sciences, 1954 Buford Ave, Saint Paul, Minnesota 55108, United States.
authors.forename: Rylie E O
authors.initials: RE
authors.lastname: Pelton
authors.affiliation: NorthStar Initiative for Sustainable Enterprise, Institute on the Environment, University of Minnesota , 325 Learning and Environmental Sciences, 1954 Buford Ave, Saint Paul, Minnesota 55108, United States.
authors.forename: Mo
authors.initials: M
authors.lastname: Li
authors.affiliation: NorthStar Initiative for Sustainable Enterprise, Institute on the Environment, University of Minnesota , 325 Learning and Environmental Sciences, 1954 Buford Ave, Saint Paul, Minnesota 55108, United States.
authors.forename: Timothy M
authors.initials: TM
authors.lastname: Smith
authors.affiliation: Erb Institute for Global Enterprise, University of Michigan , 701 Tappan Street, Ann Arbor, Michigan 48109, United States.
authors.forename: Thomas P
authors.initials: TP
authors.lastname: Lyon
mesh_terms: D003132:Commerce; D004560:Electricity; D004777:Environment; D007221:Industry