In this paper, we explore the methodologies C-K (Concept-Knowledge) and ASIT (Advanced Systematic Inventive Thinking), two distinct yet complementary approaches to innovation and problem-solving. C-K, developed by Armand Hatchuel and Benoît Weil, takes an exploratory approach to innovation, distinguishing between the concept space (C) and the knowledge space (K), enabling the generation of disruptive ideas from existing knowledge. ASIT, on the other hand, is a structured method that relies on existing resources to generate practical solutions to concrete problems. It is based on five key operators: Unification, Multiplication, Division, Symmetry Breaking, and Elimination. ASIT is particularly effective in providing rapid improvements and optimizing existing systems. In this article, we also analyze the management of empty material in a postal organization, highlighting issues related to logistical inefficiencies, lack of traceability, poor communication between departments, and the absence of clearly defined responsibilities. We propose an integrated approach that combines the conceptual exploration of C-K and the practical structuring of ASIT to offer a balanced framework for innovation.