Small businesses face persistent challenges in scaling operations due to fragmented processes, limited resources, and increasing regulatory demands. This study develops an integrated Lean-Digital framework that synthesizes Standard Operating Procedure (SOP) design, process automation, compliance management, and structured change management to support sustainable scaling in small business environments. Drawing on a systematic synthesis of literature across operations management, digital transformation, and SME development, the study identifies critical enablers and constraints influencing operational scalability. The findings indicate that while Lean principles improve process efficiency and waste reduction, their impact is significantly amplified when combined with digital tools that enable automation, real-time monitoring, and data-driven decision-making. However, the absence of structured SOPs and weak change management practices often limit the effectiveness of digital adoption in small enterprises. The proposed framework integrates four core components: standardized SOP architecture for process clarity and consistency; low-cost digital automation tools for workflow optimization; compliance mapping mechanisms to align operations with regulatory requirements; and adaptive change management strategies to support workforce transition and cultural alignment. The framework emphasizes modular implementation, allowing small businesses to incrementally adopt improvements based on capacity and readiness. It also highlights the importance of leadership commitment, employee engagement, and continuous feedback loops in ensuring long-term success. By positioning SOPs as foundational elements that connect Lean process design with digital execution, the framework offers a cohesive approach to operational transformation. It further demonstrates how integrating compliance into routine workflows reduces risk exposure while enhancing transparency and accountability. The study contributes to both theory and practice by bridging gaps between Lean management, digital innovation, and SME operational strategy. Practically, it provides actionable guidance for entrepreneurs and managers seeking scalable, cost-effective solutions to improve efficiency, resilience, and competitiveness. Ultimately, the integrated Lean-Digital framework presents a structured pathway for small businesses to transition from informal, reactive operations to standardized, technology-enabled systems capable of supporting growth in complex and dynamic market environments.