For a product that is a relatively simple line extension of existing products, where the market is well known, and the risks associated with product failure are low, a "relatively short 3-stage process focusing on speed to market" is most appropriate. This streamlined process allows the company to quickly develop and launch the product by focusing on essential stages such as idea screening, development, and commercialization, without the need for extensive business analysis or market research typical in more complex or riskier projects.