# Construction and Application of Enterprise Knowledge Base for Product Innovation Design
## 1 Introduction  
In the increasingly competitive marketplace, product innovation is a key for enterprises to maintain their competitiveness [1, 2], especially for mechanical products [3, 4, 5]. Due to the rapid update and iteration of mechanical products, an efficient, innovative design method is essential. Knowledge is an important source to inspire product innovation design [6, 7]. An effective knowledge management system plays a very important role in the product innovation design process [8, 9]. It can accelerate the formation of product design solutions and help enterprises effectively shorten the product development cycle. It can also inspire innovative ideas in the process of product design to develop innovative products. In knowledge management, the knowledge base plays an important role in knowledge storage and management [10]. A knowledge base is a set of interrelated information and data that are stored and managed for sharing and reusing in product design [11]. The existing research mainly includes the domain knowledge base and existing enterprise knowledge management systems. The domain knowledge base is mainly constructed from the perspective of a specific product structure. For example, [PERSON] et al. [12] presented a knowledge-base system for the composite component design to improve the design efficiency. With the development of enterprise informatization, Product Data Management (PDM) [13, 14] and Product Lifecycle Management (PLM) [15] have been widely used by enterprises as knowledge management tools. They are used for the effectivemanagement of product life cycle data and processes. Many scholars have conducted research on PDM/PLM. For example, [PERSON] et al. (2016) proposed a Property-Driven Development/Design (PDD) process for product development. The concepts of a PDM/PLM system are presented based on PDD to improve the development/design activities. These previous studies provide an important theoretical basis for the development of knowledge bases. However, the construction of these knowledge bases does not classify and store knowledge from the perspective of product innovation design. They cannot well inspire the product innovation activities for an enterprise. Because they can only store product data in a semi-structured or unstructured form, design knowledge in the enterprise cannot be reused effectively. Due to the lack of effective retrieval methods, engineers have to spend much time searching for relevant data and information in the product design. Therefore, a new knowledge base that can efficiently integrate the existing design knowledge to inspire innovative designs of enterprises is necessary. This new knowledge base is called the enterprise knowledge base (EKB) in this paper. In addition, a specific and systematic process of applying EKB for enterprise product innovation design is also required. In order to address the above issues, based on the function-behavior-structure (FBS) model ([PERSON] et al., 2017), this paper proposes a method to construct EKB for innovative product design. It is applied in the application process of EKB for enterprise product innovation design. In the field of engineering design ([PERSON] et al., 2017), FBS starts from product function to form a complete mapping system from the function to behavior and then to structure, which helps engineers understand the construction process of the product. This systematic structural design thinking, which starts from the function of the target product for abstracting requirement definition to the specific structural design, can guide engineers gradually to develop products ([PERSON] et al., 2017). Building on the strategy literature and the research of related theories, the functional trees based on FBP are built for similar products of the enterprise. The conceptual scheme of EKB is then formed through the mapping relationship between function units and technical units.