Conducting a thorough review of application architecture, code, tools, and development processes is essential to estimate the effort required for modernization and cloud migration. This comprehensive assessment helps identify technical debt, inefficiencies, and potential areas for improvement. By evaluating the current state of applications, businesses can make informed decisions about the necessary updates and transformations needed to optimize performance and scalability. This review also facilitates the planning and prioritization of modernization initiatives, ensuring a smoother transition to cloud environments and maximizing the benefits of contemporary technologies and practices.