Point Lookout: a free weekly publication of Chaco Canyon Consulting
Volume 10, Issue 42;   October 20, 2010: Forward Backtracking

Forward Backtracking

by

The nastiest part about solving complex problems isn't their complexity. It's the feeling of being overwhelmed when we realize we haven't a clue about how to get from where we are to where we need to be. Here's one way to get a clue.
Part of one of the tunnel boring machines used to build the tunnel under the English Channel

Part of one of the tunnel boring machines used to build the tunnel under the English Channel. The Chunnel, like many long tunnels, was constructed by boring from both ends. Actually, boring machines worked in two directions from access points in both France and the U.K. The French and British efforts met under the channel on October 30, 1990, just under three years after boring operations began.

Tunnel boring provides an intriguing metaphor for forward backtracking. One advantage of forward backtracking not mentioned in this article is that, like tunnel boring, we can apply effort at both ends simultaneously. While one team tries to solve the problem in the forward sense, another can work out solutions using backtracking. The two teams can then assemble periodically and share insights, accelerating the work at both ends. In the case of the Chunnel, boring operations on either side of the Channel proceeded in both directions from access points near shore. By analogy, we can see that sometimes it's useful to break a problem into segments, and solve it in both directions from each of the segment boundaries. Photo courtesy BBC.

Nearly every morning, if I'm in town, I do a two-and-a-half mile loop around Fresh Pond, in Cambridge, Massachusetts. I usually go at about dawn. It's peaceful, quiet, and still, with plenty of opportunities to observe the kind of wildlife you find in urban parks. Today it was rabbits, cormorants, a hawk, and of course, some dogs walking their people.

Sometimes I vary my routine. For example, I might combine the trip with a trip to the automatic teller machine at a nearby bank. When I do that, I have to figure out where to leave the pond path for the climb through the woods over the multiple branching paths that lead up to the street to go to the bank. Until recently, I always emerged from the woods too far to the northeast. I never could find the right path through the woods.

Last week I had an idea. I reversed direction, going to the bank first, then down to the pond and around the pond path. That way, I could be sure to be on the right path through the woods. Well, it worked, of course. Duh.

Point is, the next time I want to get from the pond path to the automatic teller machine at the bank, I know how to do it, because I've been over the path before.

I call this forward backtracking. By beginning at the end, and ending at the beginning, you can figure out how to begin at the beginning and end at the end.

Strangely enough, forward backtracking applies far beyond getting from Fresh Pond to my bank. It's useful for solving the most complex problems, like adjusting a 20-month project schedule to meet an imposed deadline. A problem like that can be daunting, because it involves scheduling, resources, budgets, and — inevitably — politics.

The By beginning at the end,
and ending at the beginning,
you can figure out how
to begin at the beginning
and end at the end
usual approach to such problems starts with creating lists of possible solution ideas. Then we apply them, one-by-one, or in combination, until we find something that works. If nothing works, we look for more ideas.

Forward backtracking provides some alternative approaches.

When looking for new ideas, we can apply forward backtracking by asking, "If we did have the solution, what would have been the last step that got us there?"

To discover people we might have forgotten to consult, we can ask, "If we did have a truly ingenious solution, who would have been most likely to have helped find it?"

Imaginary testing, too, can reveal attributes that help solutions: "If we had a candidate solution in hand, how would we know that it worked?"

Forward backtracking can help even beyond problem solving. For a new perspective on complex documents, try reviewing them back-to-front. And you need not worry — it won't spoil the ending. Go to top Top  Next issue: Sixteen Overload Haiku  Next Issue

Great Teams WorkshopOccasionally we have the experience of belonging to a great team. Thrilling as it is, the experience is rare. In part, it's rare because we usually strive only for adequacy, not for greatness. We do this because we don't fully appreciate the returns on greatness. Not only does it feel good to be part of great team — it pays off. Check out my Great Teams Workshop to lead your team onto the path toward greatness. More info

Your comments are welcome

Would you like to see your comments posted here? rbrendPtoGuFOkTSMQOzxner@ChacEgGqaylUnkmwIkkwoCanyon.comSend me your comments by email, or by Web form.

About Point Lookout

This article in its entirety was written by a 
          human being. No machine intelligence was involved in any way.Thank you for reading this article. I hope you enjoyed it and found it useful, and that you'll consider recommending it to a friend.

This article in its entirety was written by a human being. No machine intelligence was involved in any way.

Point Lookout is a free weekly email newsletter. Browse the archive of past issues. Subscribe for free.

Support Point Lookout by joining the Friends of Point Lookout, as an individual or as an organization.

Do you face a complex interpersonal situation? Send it in, anonymously if you like, and I'll give you my two cents.

Related articles

More articles on Problem Solving and Creativity:

Winter dawn in BostonOn Beginnings
A new year has begun, and I'm contemplating beginnings. Beginnings can inspire, and sometimes lead to letdown when our hopes or expectations aren't met. How can we handle beginnings more powerfully?
A 1928 Ford Model A Business CoupeClueless on the Concept
When a team member seems not to understand something basic and important, setting him or her straight risks embarrassment and humiliation. It's even worse when the person attempting the "straightening" is wrong, too. How can we deal with people we believe are clueless on the concept?
Signers of the 1938 Munich AgreementHow to Reject Expert Opinion: I
When groups of decision makers confront complex problems, they sometimes choose not to consult experts or to reject their advice. How do groups come to make these choices?
Henri Laurence Gantt, inventor of the Gantt ChartThe Tyranny of Singular Nouns
When groups try to reach decisions, and the issue in question has a name that suggests a unitary concept, such as "policy," they sometimes collectively assume that they're required to find a one-size-fits-all solution. This assumption leads to poor decisions when one-size-fits-all isn't actually required.
Vintage slot machine at the Casino Legends Hall of Fame at the Tropicana Las Vegas Casino Hotel Resort, NevadaWhen Fixing It Doesn't Fix It: I
When complex systems misbehave, a common urge is to find any way at all to end the misbehavior. Succumbing to that urge can be a big mistake. Here's why we succumb.

See also Problem Solving and Creativity and Critical Thinking at Work for more related articles.

Forthcoming issues of Point Lookout

Three gears in a configuration that's inherently locked upComing April 24: Antipatterns for Time-Constrained Communication: 1
Knowing how to recognize just a few patterns that can lead to miscommunication can be helpful in reducing the incidence of problems. Here is Part 1 of a collection of communication antipatterns that arise in technical communication under time pressure. Available here and by RSS on April 24.
A dangerous curve in an icy roadAnd on May 1: Antipatterns for Time-Constrained Communication: 2
Recognizing just a few patterns that can lead to miscommunication can reduce the incidence of problems. Here is Part 2 of a collection of antipatterns that arise in technical communication under time pressure, emphasizing those that depend on content. Available here and by RSS on May 1.

Coaching services

I offer email and telephone coaching at both corporate and individual rates. Contact Rick for details at rbrendPtoGuFOkTSMQOzxner@ChacEgGqaylUnkmwIkkwoCanyon.com or (650) 787-6475, or toll-free in the continental US at (866) 378-5470.

Get the ebook!

Past issues of Point Lookout are available in six ebooks:

Reprinting this article

Are you a writer, editor or publisher on deadline? Are you looking for an article that will get people talking and get compliments flying your way? You can have 500-1000 words in your inbox in one hour. License any article from this Web site. More info

Follow Rick

Send email or subscribe to one of my newsletters Follow me at LinkedIn Follow me at X, or share a post Subscribe to RSS feeds Subscribe to RSS feeds
The message of Point Lookout is unique. Help get the message out. Please donate to help keep Point Lookout available for free to everyone.
Technical Debt for Policymakers BlogMy blog, Technical Debt for Policymakers, offers resources, insights, and conversations of interest to policymakers who are concerned with managing technical debt within their organizations. Get the millstone of technical debt off the neck of your organization!
Go For It: Sometimes It's Easier If You RunBad boss, long commute, troubling ethical questions, hateful colleague? Learn what we can do when we love the work but not the job.
303 Tips for Virtual and Global TeamsLearn how to make your virtual global team sing.
101 Tips for Managing ChangeAre you managing a change effort that faces rampant cynicism, passive non-cooperation, or maybe even outright revolt?
101 Tips for Effective MeetingsLearn how to make meetings more productive — and more rare.
Exchange your "personal trade secrets" — the tips, tricks and techniques that make you an ace — with other aces, anonymously. Visit the Library of Personal Trade Secrets.
If your teams don't yet consistently achieve state-of-the-art teamwork, check out this catalog. Help is just a few clicks/taps away!
Ebooks, booklets and tip books on project management, conflict, writing email, effective meetings and more.