This assignment requires a comprehensive analysis of the strategic financial management of two retail giants, Sainsbury's and Tesco. Using the provided resources, including academic papers on strategic financial management, risk assessment, and budgeting, along with their latest financial statements, you will evaluate and compare these companies' investment appraisal techniques, risk management strategies, budgeting practices, and overall financial sustainability. The analysis should also consider the cultural and ownership factors that might influence their financial decisions.