Quantitative measurements are essential for several reasons: 1. Performance Evaluation: They allow for the assessment of the catalyst's activity, selectivity, and stability. 2. Optimization: They provide data that can be used to optimize reaction conditions, such as temperature, pressure, and reactant concentrations. 3. Scale-Up: They help in scaling up laboratory results to industrial processes. 4. Economic Analysis: They assist in determining the cost-effectiveness of the catalytic process.