Reverse Problem Solving: When You Must Have a Certain Outcome
In The 7 Habits of Highly Effective People, Stephen Covey says, “Begin with the end in mind.”
There are times when you have a specific outcome for a problem. In such instances, you have to reverse the problem solving process, that is, work backwards methodically and fill in the missing information.
To reverse problem solve, there are six steps:
- Define the problem
- What are the knowns?
- What are the unknowns?
- What is the end result (goal)?
- Develop a strategy to achieve the goal (solve the problem)
- What are the necessary steps to achieve the goal?
- Solve the problem using the steps identified to achieve the goals
- Does the solution make sense? Is it the best solution? Check the solution by working forwards
An Application
When I was in college, during a very difficult test for my Logic class, we were given the first two and the last two steps for a logic problem. We had the starting and ending point.
I looked at the first two steps and did not have a clue what the next step was, and leaving the problem was not an option since it was worth 30 percent of the total marks.
Without even knowing about Stephen Covey’s “start with the end in mind,” I decided to start with the last two steps and work my way to the starting point. I remember at the time just taking one step at a time. I would ask myself what the preceding step was, and the one before that, and so on. And in no time I was at the second to last step.
I was happy as a “pig in mud.” I reversed the process when I wrote the answer in my answer book. Many failed that exam so I was happy with my 78 percent.
The point of this story is to demonstrate that it is important to solve the problem one step at a time so you do not become overwhelmed.
Your Application
Describe a problem that you have where there is a specific outcome, how might you solve it using the reverse problem solving model?
Related Resources
Inspirer, Reflector, Innovator or Influencer, Which One Are You?
What Type of Problem Solver Are You?
The Importance of Problem-Solving by Ken Watanabe
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