Contingency Diagram
Description
The contingency diagram uses brainstorming to generate a list of problems that could arise from a process. Once problems are identified, then solutions to the problems are determined.
Uses
When identifying causes of potential problems.
When developing solutions to problems.
Before implementing a change or new process.
When planning implementation of a project phase, especially the solution.
How do I use this tool?
1. IDENTIFY THE TOPIC - write it down so that others can easily see it.
2. BRAINSTORM how things can go wrong. When evaluating a problem, ask:
What could we do to make the problem occur?
What could we do to make it worse?
When evaluating a plan or action, ask:
What events could cause the plan to fail?
Is there anything that we are assuming that may be incorrect?
3. When you feel you are no longer generating ideas, REVERSE YOUR THINKING. For each answer from step 2, determine what you would do to prevent each event from occurring. Write these adjacent to problem actions from step two using a different color.
4. When each negative idea has been reversed, THINK MORE BROADLY: for example, consider ideas that could be modified or combined.
Expertise Required
This tool is easy to use and requires little or no training.
Recommended Supplies/Materials
Flip chart
Advantages
Creates production out of negative thinking.
Disadvantages
Participants may have a biased focus.
Where can I go to learn more?
Tague N. The tools. In: O'Mara P, editor. The quality toolbox. 2nd ed. Milwaukee, WI: ASQ Quality Press; 2005. p. 93-521.