Chapter 9: Quality Control and Improvement Learning Activity: What caused me to get a flat tire on the way to work today? Background: Yes, you read that right. I got a fist tire on the way to work today. Now you have the opportunity ta help me know why! A good way to think about the Cause-and-Effect Diagram (also known as an /shikawa or Fishbone Diagram) is to ask WHY? "Why did the tire go flat? Because.". This connects with the Lean principle of " 5 Whys" - you need to ask "Why" at least 5 limes along each branch to get to the real root cause. Activity: For each main branch below [commorly referred to as 4M=Man (workers). Machine,

hapter 9: Quality Control and Improvement earning Activity: What caused me to get a flat tire on the way to work today? Background: Yes, you read that right. I got a flat tire on the way to work today. Now you have the opportunity to help me know why! A good way to think about the Cause-and-Effect Diagram (also known as an Ishikawa or Fishbone Diagram) is to ask W/H? "Why did the tire go flat? Because..." This connects with the Lean principle of " 5 Whys" -- you need to ask "Why" at least 5 times along each branch to get to the real root cause. Activity: For each main branch below [commonly referred to as 4M= Man (workers]. Machine, Materials and Methods; or other combinations of main causes], describe iust TWO Why's for each. FIGURE 9.7 Cause-and-effect diagram for loose connections. hapter 9: Quality Control and Improvement earning Activity: What caused me to get a flat tire on the way to work today? Background: Yes, you read that right. I got a flat tire on the way to work today. Now you have the opportunity to help me know why! A good way to think about the Cause-and-Effect Diagram (also known as an Ishikawa or Fishbone Diagram) is to ask W/H? "Why did the tire go flat? Because..." This connects with the Lean principle of " 5 Whys" -- you need to ask "Why" at least 5 times along each branch to get to the real root cause. Activity: For each main branch below [commonly referred to as 4M= Man (workers]. Machine, Materials and Methods; or other combinations of main causes], describe iust TWO Why's for each. FIGURE 9.7 Cause-and-effect diagram for loose connections