Offer elaboration, when answering to call for tenders, is a complex process, usually characterised by limited information and time restrictions. From the point of view of the bidding companies, this paper explores risk engineering regarding the activities describing the manufacturing of the product from design to delivery. Specifically, the paper proposes a knowledge base system to support the identification and analysis (probability / impact) of key risks that may arise during implementation. This risk identification takes place during the bidding stage so that the identified risks can be taken into account in the proposal. Through the proposed system, risk engineering knowledge can be capitalized and reused to support new bids. Risk engineering knowledge is structured by a unified model. For helping decision-makers in their risk engineering process, a reuse method, based on case based reasoning, is proposed to retrieve relevant knowledge. The proposed system leads to more accurate, less risky and higher confidence bids. This work can be extended to help the decision-makers model risk mitigation strategies.