The central problem addressed by this field is not insufficient knowledge but the fragmentation produced when the same consequential process is divided into separate disciplinary objects. Language studies may examine how something is named; epistemology how its truth is established; architecture how it takes material form; urbanism how it distributes access; environmental psychology how it is experienced; ecology how it modifies living systems; media studies how it circulates; archives how it becomes retrievable. Each description can be rigorous while the causal continuity connecting them disappears. A planning category makes this visible: it begins as language, becomes a classification, enters a database, acquires administrative force, modifies spatial possibilities, alters investment and eventually changes lived environmental conditions. The intellectual problem lies precisely in those passages. Contemporary research repeatedly suffers from conceptual inflation when travelling terms lose specificity; evidentiary discontinuity when claims change format without preserving assumptions; scalar disconnection when mechanisms operating at different levels are treated as equivalent; temporal compression when slow processes are judged through short cycles; and infrastructural invisibility when standards, formats and maintenance systems are mistaken for neutral supports. The transdisciplinary response is therefore not to accumulate perspectives but to reconstruct transformations. Translation itself must become observable because concepts mutate as they cross institutions and disciplines: resilience can become an instruction to endure, participation can shrink into attendance, evidence can collapse into an indicator. The field's distinctive object is consequently the passage through which concepts, evidence, material arrangements, technologies, institutions, experience and ecological processes transform one another. Fragmentation is overcome not by synthesis in the abstract, but by constructing precise, testable passages between forms of knowledge.