Toyota, the Japanese automaker, is renowned for its long-term and collaborative relationships with its suppliers, which enable continuous improvement and innovation in quality, cost, and delivery. By providing technical assistance, training, and feedback, as well as involving them in joint problem-solving and product development, Toyota has set a benchmark for supplier development and innovation. Similarly, IKEA, the Swedish furniture retailer, is committed to sustainability and social responsibility in its supply chain, and works with its suppliers to develop and innovate in these areas. IKEA supports its suppliers with audits, standards, and incentives, as well as co-creating solutions and initiatives that reduce environmental impact and improve working conditions. Lastly, Procter & Gamble, the American consumer goods company, is a leader in open innovation, leveraging its suppliers as a source of new ideas, technologies, and capabilities. Procter & Gamble shares its innovation challenges and opportunities with its suppliers, connecting and collaborating with them through platforms and networks. To inspire and guide you, these are some of the best practices of supplier development and innovation from different industries and contexts.