The research reveals the problem of product development (PD) in contemporary mechanical engineering: the originality and closeness of the architecture do not allow one to get a flexible, relatively inexpensive, and uncomplicated product. In an attempt to form a universal product development system, the authors review the development experience of engineering industry leaders for integration. At the initial stages of product conceptualization, this adaptive PD system of the manufacturer and its stakeholders can reduce the number of engineering hours for design, manage the complexity level, and reduce the product development cost. Changing the elemental saturation of the product, structural content, and technical and economic support of the category is possible due to the formation of a universal integrated PD system, which provides an opportunity to reduce the production’s complexity and the market environment’s dynamism. Additionally, it determines the manufacturer’s ability to consider changes in consumer demands. Within the PD framework, the selection of elements, tools, models, technologies, and criteria is carried out by integrating the participants’ actions. An assessment was made using the Likert scale, index method, and relevance correlation matrix. It is proposed to build an integrated PD system under alternative choice conditions.