Check sheets are simple tools that allow data to be collected and recorded in an organized manner. Check sheets can be used to determine the frequency of a defect and the time period between occurrences by counting and categorizing the number of defects that occur over a specified time interval. Check sheets can also help to identify the causes and patterns of defects, and to monitor the effectiveness of improvement actions. The other statements are not true about check sheets. Check sheets do not provide a quick method to identify if possible defects exist, as they require data collection and analysis. Check sheets do not allow improvement teams to see if action items are being completed on time, as they are not designed to track the progress of tasks. Check sheets do not provide an indication of correlation between defects, as they do not measure the relationship between variables. References: Check Sheet | APICS Dictionary Term of the Day, APICS CPIM 8 Planning and Inventory Management | ASCM