In TQM tools, Data Collect Form and Run Chart provide clear view on frequency of each issue occurred in timely (weekly in this case) manner. Pareto Chart can help identify the most essential issues (20-80 phenomenon) affecting overall service quality. Compare with creating charts manually, Excel is always a better tool to create professional analytical results. Please ask question and exchange (teach or learn) the tricks (may attach some example) on how to create tables and charts using Excel.