Global supply chains operate in an increasingly complex and volatile environment, where the integration of functional units is paramount for achieving operational excellence and competitive advantage. This review paper explores the critical role of cross-functional collaboration (CFC) among Sales, Engineering, and Finance in optimizing global supply chain performance, with a focus on enhancing efficiency, responsiveness, and profitability. Sales drives demand forecasting, Engineering innovates product and process designs, and Finance ensures fiscal discipline, yet silos often disrupt their alignment, leading to inefficiencies and missed opportunities. This study synthesizes theoretical frameworks, such as the resource-based view and systems theory, with empirical evidence from peer-reviewed literature, alongside practical industry examples from leading firms like Toyota, Apple, and Procter & Gamble. It identifies key challenges to cross-functional collaboration(CFC), including siloed mindsets, communication barriers, global complexity, data inconsistencies, and resistance to change, which collectively hinder seamless coordination. The paper proposes actionable strategies to overcome these barriers, such as integrated Sales and Operations Planning (S&OP), shared metrics, technology enablement through platforms like SAP, leadership governance, cultural transformation, and risk management integration. A simplified conceptual model illustrates the interplay of Sales, Engineering, and Finance, highlighting communication flows, shared goals (e.g., customer satisfaction, profitability, agility), and the role of enabling technologies like ERP systems. Findings underscore the benefits of effective cross-functional collaboration(CFC), including reduced lead times, cost savings, enhanced innovation, improved financial performance, and greater supply chain resilience. The paper concludes with future research directions, particularly the potential of AI and blockchain to further enhance cross-functional collaboration(CFC), offering a roadmap for practitioners to foster collaboration in multi-tier global supply chains.

Collaboration, Supply Chain Management, Integration, Efficiency, Communication, Risk Management

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