Check Sheet in 7 QC Tools

 - A check sheet is a simple and powerful tool for data collection. It is used to compile and record data from existing observations or historical data.

 - Quantitative and qualitative data also collected in check sheet.

Function of check sheet:

 - To quantify defects by type

 - To quantify defects by location

 - To quantify defects by cause (Machine, Man, Method, Materials)

All quality tools fall into 5 categories

 - Collecting data,

 - Understanding data,

 - Understanding process,

 - Analyzing process,

 - Solving problem,

Steps for making Check Sheet

 1) Define event and data.

 2) Determine 5W and 1H.

 3) Construction of Check Sheet.

 4) Testing.

 5) Final approval for use.

Step 1: Define event and data

 - Define what information is needed and from which location?

Step 2: Determine 5W and 1H

 - Why is the data needed?

 - What type of data collection required?

 - From Where the data should be collected?

 - Who collect the data?

 - When will collect the data?

 - How the data should be measured?

Step 3: Construction of Check Sheet

Check Sheet has 3 types of information.

1) Title

2) Source
 - Problem statement/ Name of project.
 - Location of data collection.
 - Date and time.
 - Name of person who collect the data.

3)Content Information
 - Column/Row with title.
 - Column/Row to record the data.
 - Column/Row to record total.

Step 4: Testing

 - Test the sheet with at least 3 different appraiser.

 - Column/Rows are relevant and required.

 - Check that sheet is easy to record and use.

 - Make changes based on feedback from appraiser.

Step 5: Final approval for use

 - Explain the use of sheet to data collector.

 - Train the people if the don't understand the use of sheet.

 - After collecting data standardize it's use to assure consistency.

Examples:

 - In this example, we have mentioned the shop 1 defect for different types of product and at the end total defects to take appropriate action to eliminate those. It is also called data collection sheet.

 - In this example, we have counted the frequency of various defects in ongoing production at the time of checking the component. It is also called as Tally sheet or Tally mark.

 - In this example, We have identified the location of defect in product. it is also called as Location plot or Concentration plot.

Benefits of Check Sheet:

 - By using Check Sheet we can make data collection simple, systematic and effective. 

 - We can save time and easily collect data in regular manufacturing process.

 - It is used for monitoring process performance

 - It is helpful for traceability also.