The purpose of this study is to better understand the functioning of knowledge sharing in the supply chain of Taiwan IT industry and face the current practice of modular component outsourcing with a theoretical threat of architecture change and modularity trap. Today, modularity and component outsourcing became almost an prerequisite for an successful IT company. Product architectures are widespread and well defined. It is however the question nobody dares to ask – what if this changes? How can the Taiwan suppliers make sure, that they will still be in the game even if the rules change? How can they assure that their position as the cutting edge component providers won`t be taken by someone else? The basic premise of the research is, that the relationship management of supplier and buyers often seen in countries with Confucian tradition can overcome this threat thanks to deeply rooted trust and good and opened communication patterns. This paper first introduces the Supplier-buyer relationship theory and background on its functioning within the New Product Development (NPD) area. The study also touches on the issue of Early Supplier Involvement (ESI) into the New Product Development. Next the theory on Modularity and Modularity Trap are introduced. Based on the literature review, I construct an research framework, consisting of two bodies: The architecture as a variable and Buyer-supplier relationship and NPD. The major conclusions of this study are (1) The architecture of the product to be developed is an important driver on the supplier-buyer relationship creation. (2) To build the relationship with buyers is important step for the suppliers, but it can only be build around technology that is important for the buyer. (3) Supplier`s understanding of architecture knowledge of its buyers is crucial. (4) The main reason to invite supplier into New product development is buyers technological distance between what they can have and what they want to have. (5) Product Complexity (number of parts and their interconnections within the product) have a positive influence on the supplier role creation. (6) All buyers have a rather good component knowledge. (7) The management alignment will be greatly influenced byt architectural attributes of the product to be developed.