Implementation Challenges in eCTD Submissions Across Regulatory Regions

Abstract

The electronic Common Technical Document (eCTD) has become the cornerstone of global regulatory submissions, offering a harmonized structure for dossier assembly, data integrity, and lifecycle management. Since its inception under ICH M4 in 2002, successive versions of the eCTD specification (v2.0, v3.2, and the forthcoming v4.0) have introduced features such as enhanced XML metadata, interactive tables of contents, and robust version control mechanisms. Nonetheless, pharmaceutical sponsors and regulatory authorities continue to face substantial implementation challenges across diverse regions. These include technical hurdles—such as divergent stylesheet requirements, metadata mapping complexities, and the integration of legacy document management systems—as well as organizational and human factors like insufficient change management frameworks, limited specialized staffing, and inadequate cross-functional training. Regulatory uncertainties in emerging markets further compound these issues, with voluntary implementation pilots and unclear validation criteria delaying global rollouts. Through a systematic literature review of 42 peer-reviewed studies and white papers, semi-structured interviews with 15 multinational regulatory-affairs professionals, and three illustrative case studies, this manuscript delineates the principal barriers to eCTD adoption. We categorize challenges into technical (metadata compliance, XML schema validation, interoperability), organizational (governance, training, resource allocation), and regulatory (regional specification divergences, emerging-market guidance gaps).