In aeronautics industry today, companies collaborate closely in virtual enterprises to develop products and solutions that are more integrated and more complex, and that aims to target larger responsibilities regarding the product life-cycle. On top of this, lead-time and development costs needs to be reduced.The 7 Day Proposal (7DP) is the conceptual name of a framework wherein a customized proposal is produced by a virtual enterprise consortium within seven days from a received request for proposal. This is substantially shorter than what is current practice today and implies that new methods, tools and ways of working are needed. Today, in offer processes, time is lost because of insufficient, or immature, available information and knowledge at gate reviews when decisions are due, causing time consuming iterations. The Gated Maturity Assessment (GMA) concept is intended to help reduce these costly iterations by targeting the ambiguity at these gate reviews in order to reduce the uncertainty in decision base. Other frameworks using maturity include Technology Readiness Levels (TRL) and the Capability Maturity Model (CMM). TRL is an artefact-focused framework developed by NASA to assess space technology maturity. CMM is a process-focused framework for assessing organisations' software development process capability (maturity). The GMA is a concept for assessing the maturity of the knowledge that goes into a gate review (i.e. a decision document). The GMA is intended to support decision makers by assuring confidence in these decision points and thereby reducing the number of iterations, hereby reducing lead-time and increases the quality of the process.This paper reports on the development of the GMA concept from the 7DP use case, and also the development of a support tool intended for use in the 7DP process. Essentially, the 7DP process is a stage-gate process like many corporate product development processes with a number of decision gates. Therefore there is a future wish to move towards an engineering design context with this concept. The work is part of the 70 million € European project VIVACE where GMA is part of a Knowledge Enabled Engineering solution to the 7DP use case.