This report provides a comprehensive analysis of business decision-making, focusing on the case of Blackfriars restaurant. It begins with an introduction to the importance of decision-making in business and provides an overview of the restaurant. The report details the collection of both primary and secondary data, including survey methodologies and questionnaire design to understand customer preferences. It then delves into data analysis, using representative values, descriptive statistics, and measures of dispersion to draw conclusions about sales and profit trends over a ten-year period. The analysis includes the computation of quartiles, percentiles, and correlation coefficients. The report also covers the graphical presentation of data, trend line forecasting, and the use of software and techniques to disseminate information effectively. Finally, it explores information processing tools, project planning, and financial tools for decision-making, including investment appraisal, to assess the future profitability of Blackfriars restaurant. The report concludes with a summary of findings and recommendations.