According to the study by Robert Cooper and the Industrial Research Institute (IRI), the most popular tools for managing the New Product Development (NPD) portfolio among 205 member companies are the Financial method and Business strategy. The Financial method involves evaluating projects based on their expected financial returns, such as net present value (NPV) or internal rate of return (IRR). Business strategy involves aligning NPD projects with the company's strategic goals and priorities to ensure that new products support the overall business direction. References: Cooper, R. G., Edgett, S. J., & Kleinschmidt, E. J. (2001).
Portfolio Management for New Products: Picking the Winners. Basic Books.