What is a Check Sheet?

A Check Sheet is an important technique for effective data collection and analysis. It is a form used to collect required data in a systematic and organized manner.

A Check Sheet is a data collection tool that usually identifies where and how often problems appear in a product or service.  In other words, it is a blank form used for systematic collecting and organizing data on a factual time basis at the location where the data is generated.

It is specifically designed for the kind of process being investigated. Both variable and attribute data can be recorded on this sheet. The collected data can be qualitative or quantitative. If the data is quantitative, often it is called a tally sheet. Data collected can be used as input for other quality tools such as histogram, bar graph, and Pareto chart.

When Would We Use a Check Sheet in a Six Sigma Project?

Check Sheets is a highly proven method in many industries for business process improvements.

  • Use check sheets when data is collecting manually
  • Use check sheets to capture the shift, machine, and operator production data
  • When collecting frequency data and identifying patterns of rejections, defect location, and defect causes.
  • To capture product and process-related parameters to ensure the quality

Why Do We Record Check Sheets

Check Sheet is one of the famous 7 QC process improvement tools. It is used for measured data during the Measure phase of DMAIC. Generally, it is a table with defined rows and columns. Operators enter one checkmark for each data point or a defect. Check sheets also used for traceability purpose

How to Create Check Sheets

  • Determine what information to capture. In other words, what defect or problem data to collect
  • Establish the data collection frequency
  • Construct the form including title, date/time, location, name of the operator, and categories
  • Test the form with  three or four operators to see all the important information captured in the form and also make sure it is easy to use
  • Train the operators on the usage of form
  • Get the final approval to use the form.

Different types of Check Sheets

  • Production process distribution check sheet
  • Defect location check sheet
  • Defect cause check sheet
  • Defective item check sheet
  • Check-up confirmation sheet nothing but a checklist

Benefits

  • To provide documentary evidence of data collection
  • Helps to create a histogram, bar graph, and Pareto chart
  • Monitor the process performance and also easy to use
  • To provide a base for future reference
  • Quantify defects by type, location, and cause
  • It helps to identify the frequency of the problem occurring

Checklists vs Check Sheets

Check sheet is one of the 7 QC process improvement tools is for capturing and categorizing the observations. While the checklist is a mistake-proofing aid to ensure all the important steps or actions have been taken, especially, when checking or auditing the process outputs.

A check sheet is used to collect the data, whereas a checklist is used to mark the accomplishment. A checklist is a tool to organize the work effectively and to verify the most critical tasks efficiently.

An Example of Creating and Using a Check Sheet

Following are the examples of the Tally sheet. Just list the type of non-conformance, tally the number of times it happens, and sum the total. Furthermore, it is very easy to turn into a Pareto chart.

Excel Template

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What is a Measles Chart

Measles Chart, also known as defect location check sheet, is a visual tool for collecting data. It is commonly used to record location data and also shows the problems in a geographic area.

When Would You Use a Measles Chart?

Use measles chats specifically to analyze the problem’s location and density, not just collecting the count of problems. In addition, Measles helps to determine where the common defects on parts are located.

How to use Check Sheets Along Side Measles Charts

Check Sheet is to monitor the number of defects and percentage of defects; simultaneously, measles charts help in identifying the location of defects.

In a manufacturing scenario, draw a picture of the part. Whenever a defect is identified, the operator has to mark it on the picture where the defect has occurred.

An Example of a Measles Chart

Example: A big red x on the engine area on a car image given to you by AAA to show you need to change your oil.

Also see Problem Identification.

Helpful Video

Six Sigma Black Belt Certification Questions:

Question: Which of the following tools would be most appropriate for collecting data to study the symptoms of a problem? (Taken from ASQ sample Black Belt exam.)

(A) Check sheet
(B) Flow diagram
(C) Force-field analysis
(D) Activity network diagram

Answer:

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