VRIN/VRIO Resource Audit

The VRIN/VRIO resource audit is the operational test of the resource-based view of the firm: it examines a firm's resources and capabilities to judge which of them can be a source of sustained competitive advantage. Jay Barney's 1991 article established the criteria — a resource must be Valuable, Rare, Imperfectly imitable, and Non-substitutable (VRIN) — and later restated them as the VRIO question set, adding whether the firm is Organized to exploit the resource. Margaret Peteraf's 1993 cornerstones paper gave the same logic an economic grounding through resource heterogeneity, ex post and ex ante limits to competition, and imperfect mobility. Together they shifted strategy's attention inward, arguing that durable advantage comes less from industry position than from idiosyncratic, hard-to-copy resources. The audit walks each resource through these tests to classify its competitive implications.