Sustainable procurement: Building legitimacy in the supply network

The challenges introduced by sustainable development deeply affect purchasing and supply management practices and therefore foster a change in the firm's supply network. After a literature review on supply network management, sustainable sourcing and legitimacy, this paper presents the results of an in-depth case study of a gardening distributor which adopted a sustainable strategy. The analysis illustrates how the firm conquers its legitimacy in sustainable development through the evolution of its supply network. The paper highlights three types of legitimacy – product legitimacy, corporate legitimacy and cause legitimacy – and reveals the different roles of business and non-business actors in the firm's extended sustainable supply network.

► The relevance of the network approach to address sustainable procurement issues.
► Developing relationships with non-business actors is a strategic legitimating process.
► This process concerns the offer legitimacy, the corporate legitimacy and the cause legitimacy.
► Cooperating with non-business actors seems to require a more entrepreneurial mode of sourcing.
► Sustainable procurement is constrained by the market maturity hence requiring careful timing.