## 2 Research Review
### New Product Research and Development Management Methods and Thoughts Combing
#### Product and Cycle Optimization Method  
The core idea of product and cycle-time excellence (PACE), introduced above, is that it is decision-driven. The practice has proved that this method can effectively shorten the product development cycle by 40-60%, increase product productivity by 25-80%, and reduce time waste by 50-80%.  
Integrated Product Development Method  
Concept and characteristics  
Integrated product development (IPD) is a set of leading and mature product development management ideas, models, and methods. It is the integration of all processes related to product development. IPD regards product development as an investment activity, conducts a portfolio analysis, and decides whether to continue the next stage according to the review results throughout the process. Different from other methods, IPD is a market-oriented product research and development system. It requires that the entire product research and development innovation process be based on consumer demand and the monitoring of market competition changes during the research and development process. In terms of technology management, IPD emphasizes the platform's role and implements an asynchronous R&D strategy through public modules, which distinguishes technology R&D from product R&D, and emphasizes cross-departmental collaboration. To solve the shortcomings of other methods, IPD proposes a structured parallel R&D process to improve organizational capabilities and the development of specialized and compound human resources [18].  
Key factors affecting the implementation of IPD  
Foreign scholars have proposed that the successful implementation of IPD will be affected by corporate brand positioning and goal setting, the understanding of customer needs, contact with suppliers, and the level of procurement and project management [19]. Domestic scholars have also identified seven types of key factors through factor analysis methods, namely: corporate executives' support for IPD, knowledge sharing, corporate strategic planning, project management, IPD project team integration, communication and collaboration, and other factors [20]. It is clear that the above conclusions are closely related to the definition of IPD. Based on these critical factors, an optimization plan for the IPD process can be proposed. However, there is still a lack of empirical research on the relationship between the various factors and the action mechanism in current academic circles.  
Similarities with the agile concept  
The concept of IPD and the concept of agile development are the same. For example, with market demand as the core, product development is regarded as an investment (user value), and products can be launched accurately (commercial value), quickly, at low cost, and with high quality through basic public modules and cross-departmental teams. There is multi-team participation and decision-making at each review point, through various technical improvements to improve product development efficiency and reduce waste, and continuous delivery. It can be used to customize the process to adapt to the corresponding team size and further product development. The specific research classification is shown in Table 1.