Redesigning and updating products represent time-consuming processes, even if the same methodology as the original design is applied. New political influences, economic factors and newly developed techniques must be taken into account. Reliable tools and robust methods to streamline the process are therefore necessary to support engineering designers in their decision making and potentially decrease the time to market for the revised product. Three tools with different focuses will be used to structure an efficient and comprehensive methodology either for new or redesign of a product in a circular economy. The first tool aligns the class of good of the product with four different circular approaches, establishes the basic framework of the methodology and provides the designer with a suitable circular approach. The next tool is a method-variants analyzer that serves as a guidance tool for the designer to understand the dynamic relationship of product type and design methodology in order to determine the most efficient method in each design phase The third tool will assist designers with specific tasks regarding the material of a certain part. Utilizing numerical values of the inherent chemical and physical properties of the material, it is possible to assess and align the parts’ performance in fulfilling assigned functions and the parts’ behavior throughout the recycling process. This subsequently improves the assessment of the product in correlations of recycling and functions fulfillments, and its evaluations for potentially better alternatives. Hence, with the combined approach of those three tools into one methodology, the design engineer will be assisted throughout the whole process with: swift feedback regarding the circular approach, most suitable for the goods type of the product; proposals for the necessary depth of the design process for each assembly as well as balancing functionality and recyclability of single parts.