Why Why Analysis Presentation.pdf
- 1. www.citoolkit.com Continuous Improvement Toolkit Why-Why Diagram WHY? WHY?
- 2. www.citoolkit.com Why-Why Diagram 2 5 Whys is most effective when used to solve simple problems with a single root cause It follows a path that is linear toward the root cause PROBLEM ROOT CAUSE
- 3. www.citoolkit.com Why-Why Diagram 3 Oftentimes, a problem is the result of multiple causes occurring together PROBLEM Each cause is the result of a further cause or multiple causes
- 4. www.citoolkit.com Why-Why Diagram 4 Each time you ask why, there might be more than one answer In other words, a problem may have different potential root causes
- 5. www.citoolkit.com Why-Why Diagram 5 A Why-Why Diagram is an extension of the 5 Whys approach They are similar in that they both ask the same Why question multiple times WHY? WHY? WHY? WHY? WHY?
- 6. www.citoolkit.com Why-Why Diagram 6 A Why-Why Diagram is used to identify the root causes of a problem when there are multiple factors to consider There may be multiple answers at each stage, and each of these answers need to go through a separate process of the why-whys analysis WHY? WHY?
- 7. www.citoolkit.com Why-Why Diagram 7 Such hierarchical structure of potential causes can be represented in a tree diagram or a fishbone diagram The information in this diagram is in fact the same as what you would find in a fishbone diagram, but the format is different
- 8. www.citoolkit.com Why-Why Diagram 8 The problem will normally be placed on the left side of the diagram whereas the most specific causes will be placed on the right side Lines can be used to connect related series of causes Problem Possible cause Possible cause Possible cause Possible cause Possible cause Possible cause Possible cause
- 9. www.citoolkit.com Why-Why Diagram 9 Problem Possible cause Possible cause Possible cause Possible cause Possible cause Possible cause Possible cause Possible cause Possible cause Possible cause Possible cause Possible cause Possible cause Root cause Possible cause Possible cause Root cause Possible cause Root cause Root cause Root cause Root cause Root cause Root cause The most specific causes will be reflected as you move toward the right Level #1 Level #2 Level #3 Level #2 Level #3 Levels of Whys
- 10. www.citoolkit.com Why-Why Diagram 10 Invoice faults Measurement Environment Equipment Man Method Material Inadequate printers System not integrated Poor technical support Increased workload Manual data entry Poor audit system Poor ergonomics Noisy office Inadequate paper supply Measurement variability Difficult process Potential causes can be organized into categories to provide better focus and easier reference Cause categories using the 6 Ms approach
- 11. www.citoolkit.com Why-Why Diagram 11 Benefits Identifies the potential causes of an undesirable effect in order to solve it Identifies the potential factors that may cause an effect to prevent future problems Provides useful information to later problem-solving tools
- 12. www.citoolkit.com Why-Why Diagram 12 Often constructed during team brainstorming sessions By going through the steps of drawing the diagram with your team, everyone gains a better understanding of the problem, making the solution easier to find later
- 13. www.citoolkit.com Why-Why Diagram 13 With your team, clearly state the problem then write it on a post-it card Place the problem card on the left side of a whiteboard or wall How to Construct the Diagram //
- 14. www.citoolkit.com Why-Why Diagram 14 Ask ‘Why the problem occurs’ Let the team members write as many causes as possible on post-it cards, group similar causes together, then stick them up to the right of your problem How to Construct the Diagram // // // // //
- 15. www.citoolkit.com Why-Why Diagram 15 Ask Why again for the generated causes and write the causes to the right Start with the main causes and then the secondary causes and so on How to Construct the Diagram // // // // // // // // // // // //
- 16. www.citoolkit.com Why-Why Diagram 16 Keep asking Why until the team identifies the root causes of the problem You may need to collect and analyze data to confirm identified root causes are real How to Construct the Diagram // // // // // // // // // // // // // //
- 17. www.citoolkit.com Why-Why Diagram 17 Once you are finished, discuss and agree on the corrective actions that will permanently solve the problem How to Construct the Diagram
- 18. www.citoolkit.com Why-Why Diagram 18 Example – Poor Sales WHY? Poor sales Inadequate promotion Ineffective distribution High manufacturing cost Poor economy Limited advertisement budget Small sales staff Poor product design Poor quality High price WHY?
- 19. www.citoolkit.com Why-Why Diagram 19 Example - Customer complaint Coffee not tasting good Unclean coffee maker Low water quality Over roasting Using water from the tap Long roasting period Coffee maker not cleaned well Easier to access tap water Cleaning SOP not followed Cheaper than bottled water Coffee maker not cleaned daily As per current work instructions No one knows about the SOP Cost savings program in place Old obsolete work practices Can’t change current machine settings Cost savings is a top priority SOP is not shared yet No system to update work instructions Manual doesn't cover changing the settings Current machine settings No cleaning schedule in place
- 20. www.citoolkit.com Why-Why Diagram 20 /// /// /// /// /// /// /// /// /// /// /// /// /// /// An idea that has been chosen An idea that has not been chosen A link between causes that are related
- 21. www.citoolkit.com Why-Why Diagram 21 From left to right /// /// /// /// /// /// /// /// /// /// /// /// /// /// From center to the outside /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// ///
- 22. www.citoolkit.com Why-Why Diagram 22 Further Information Be aware of adding causes which are actually solutions The main idea behind the why-why diagram is to brainstorm all possible causes that may contribute to a problem, and not brainstorm solutions
- 23. www.citoolkit.com Why-Why Diagram 23 Further Information A cause-and-effect matrix can be used to prioritize the causes of the problem Prioritizing and selecting the key causes will minimizes the need for more statistical analysis of inputs that are unlikely to have an impact on the output
- 24. www.citoolkit.com Why-Why Diagram 24 Further Information The measure of success for a fishbone diagram is the quality of answers as well as the quantity of ideas Problem // // // // // // // // // // // // // // // // // //