
Gachi Fernandez and Sergio Cortazzo are one of Argentina's top young professional tango couples. They have toured the world, and they perform frequently in Buenos Aires. Tango may be unique among dances, because observing tango performed well can be a moving, dramatic experience. But it is far less dramatic when the dancers perform separately, which might explain the meaning of the expression, "It takes two to tango."
So it is with scope creep and cognitive biases. We can experience scope creep when only some people in the organization are in the grip of a cognitive bias. But when several people are so influenced, and when each one's cognitive bias mates well with the biases of others, scope creep can truly blossom. Photo by Marcela Carena, courtesy U.S. Fermi National Accelerator Laboratory.
The hot hand fallacy is the belief that we can better estimate the outcome of tests of skill if we weigh recent results more heavily than less recent results. It was first identified by Gilovich, Vallone, and Tversky in 1985. [Gilovich, et al., 1985] They found that the belief that basketball players can have "hot hands," leading to streaks of successful shooting, is without statistical foundation. That is, players do have "hot streaks" and "cold streaks," but the streaks that do happen are consistent with random chance.
Nevertheless, people do believe in the "hot hand," in basketball, and at work.
When someone has succeeded at a string of assignments, managers and executives tend to attribute that success, without proof, to the performer's innate capabilities. And the longer the string of successes, the more faith they have in the belief, even though every string of successes has a beginning, before which outcomes were less stellar.
When we believe someone has a "hot hand," we tend to ensure that he or she is fully occupied. Then, when a difficult challenge with a troubled history comes along, we sometimes try to fit it into whatever the hot-handed people are already doing. We add it to their responsibilities, hoping for yet another success. If it doesn't fit well, we make it fit. Voila! Scope creep.
But there's a little more to it. The people whom we regard as having a "hot hand" often regard themselves that way, too. They overestimate their capabilities, partly because of the hot hand fallacy, and perhaps partly due to another cognitive bias called the illusion of control. The illusion of control is our tendency to overestimate our ability to control events that are beyond our control.
For example, a project manager who completes a project successfully might not notice that she was able to retain all of her staff for the life of the project — no key people were suddenly reassigned to other projects. Scope creep often takes place
outside our awareness, due to
misjudgments arising from
cognitive biasesIn many organizations, such a record is rare. But a project manager exulting in success might not notice this fortunate turn of events. Most project managers cannot control these "staff raids," but when they don't happen, the project runs more smoothly. Project managers then might tend to attribute the project's success to their own performance, neglecting to attribute any of it to good fortune. Project managers, or any managers, who attribute successes to their own performance, ignoring good fortune, might be in the grip of the illusion of control. And someone in that state is more likely to accept additional responsibilities when they're offered. Voila! Scope creep.
This example suggests that two people under the influence of different cognitive biases might produce collaborative misjudgments more erroneous than either of them acting independently, if their respective cognitive biases interoperate synergistically. Fascinating. First issue in this series
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More about scope creep
Some Causes of Scope Creep [September 4, 2002]
- When we suddenly realize that our project's scope has expanded far beyond its initial boundaries á#8212â when we have that how-did-we-ever-get-here feeling á#8212â we're experiencing the downside of scope creep. Preventing scope creep starts with understanding how it happens.
Scopemonging: When Scope Creep Is Intentional [August 22, 2007]
- Scope creep is the tendency of some projects to expand their goals. Usually, we think of scope creep as an unintended consequence of a series of well-intentioned choices. But sometimes, it's much more than that.
More Indicators of Scopemonging [August 29, 2007]
- Scope creep á#8212â the tendency of some projects to expand their goals á#8212â is usually an unintended consequence of well-intentioned choices. But sometimes, it's part of a hidden agenda that some use to overcome budgetary and political obstacles.
The Perils of Political Praise [May 19, 2010]
- Political Praise is any public statement, praising (most often) an individual, and including a characterization of the individual or the individual's deeds, and which spins or distorts in such a way that it advances the praiser's own political agenda, possibly at the expense of the one praised.
The Deck Chairs of the ``Em''Titanic``/Em'': Task Duration [June 22, 2011]
- Much of what we call ``Em''work``/Em'' is as futile and irrelevant as rearranging the deck chairs of the ``Em''Titanic``/Em''. We continue our exploration of futile and irrelevant work, this time emphasizing behaviors that extend task duration.
The Deck Chairs of the ``Em''Titanic``/Em'': Strategy [June 29, 2011]
- Much of what we call ``Em''work``/Em'' is about as effective and relevant as rearranging the deck chairs of the ``Em''Titanic``/Em''. We continue our exploration of futile and irrelevant work, this time emphasizing behaviors related to strategy.
Ground Level Sources of Scope Creep [July 18, 2012]
- We usually think of scope creep as having been induced by managerial decisions. And most often, it probably is. But most project team members á#8212â and others as well á#8212â can contribute to the problem.
Scope Creep and the Planning Fallacy [February 19, 2014]
- Much is known about scope creep, but it nevertheless occurs with such alarming frequency that in some organizations, it's a certainty. Perhaps what keeps us from controlling it better is that its causes can't be addressed with management methodology. Its causes might be, in part, psychological.
Scope Creep and Confirmation Bias [March 12, 2014]
- As we've seen, some cognitive biases can contribute to the incidence of scope creep in projects and other efforts. Confirmation bias, which causes us to prefer evidence that bolsters our preconceptions, is one of these.
On Planning in Plan-Hostile Environments: I [April 23, 2025]
- In most organizations, most of the time, the plans we make run into little obstacles. When that happens, we find workarounds. We adapt. We flex. We innovate. But there are times when whatever fix we try, in whatever way we replan, we just can't make it work. We're working in a plan-hostile environment.
Footnotes
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Related articles
More articles on Project Management:
Dispersity Adversity
- Geographically and culturally dispersed project teams are increasingly common, as we become more travel-averse
and more bedazzled by communication technology. But people really do work better together face-to-face.
Here are some tips for managing dispersed teams.
Project Improvisation Fundamentals
- Project plans are useful — to a point. Every plan I've ever seen eventually has problems when
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Project Improvisation as Group Process
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trouble coming in time to replan thoughtfully — if we're nearly clairvoyant. Usually, we have
to improvise. How a group improvises tells us much about the group.
The Politics of the Critical Path: II
- The Critical Path of a project is the sequence of dependent tasks that determine the earliest completion
date of the effort. We don't usually consider tasks that are already complete, but they, too, can experience
the unique politics of the critical path.
Why Scope Expands: II
- The scope of an effort underway tends to expand over time. Why do scopes not contract just as often?
One cause might be cognitive biases that make us more receptive to expansion than contraction.
See also Project Management and Project Management for more related articles.
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