[工程科技]5wwhy问题解决法英文版.ppt

5 WHY * Problem Solving Tool box 5 Why Linkage between 5-Why 5-Step 5 Why 5-Why is a Root-Cause-Analysis tool 5-Step is a Problem-Solving-Process Step 1: Identify and define the problem. Step 2: Take immediate action to prevent the problem from reaching the customer. Step 3: Identify the root cause of the problem. Step 4: Take irreversible corrective action to eliminate or minimize the effects of the root cause of the problem. Step 5: Verify that the corrective action is effective. 5-Why works here 5 Why Stumbled and fell on lobby stairs. Why 1: Forgot to use hand rail. Why 2: Was mentally agitated when came to work. Why 3: Argued with wife over Mother-in-law’s visit. Why 4: Mother -in-law visited for a week. Why 5: WHY DID THE PROBLEM OCCUR? AN EMPLOYEE REPORTED A BROKEN ARM. Wife loves her mother. Why 6: Where did you hide the Root Cause? Like a detective, we find the Root Cause by asking questions. Like a detective, we start with the end of the trail and work backwards. We start with the Problem. 5 Why 5 Why In the Delphi organization, a common 5-why Root Cause Analysis is used to analyze and solve quality problems. There are four major parts of the 5-why Root Cause Analysis process: Understand the Situation Cause Investigation Problem Correction Prevention through Error Proofing 5 Why Part 1: Understand the situation During the first part of the process, you: Identify the Problem Clarify the Problem Breakdown the Problem Locate the Point of Cause (PoC) Grasp the significance of the problem Part 2: Cause Investigation In the second part of the process, you: Conduct a “5-Why” investigation to identify the root cause for the specific problem For why the problem was not detected for why the “system” allowed the problem to occur 5 Why Part 3: Problem Correction In the third part of the process, you: Take specific action to correct the problem(s). At a minimum, short-term temporary measures are required to protect the customer. Part 4: Prevention through