The term scope creep describes a gradual expansion of an effort's scope, often outside the awareness of the people involved. They do recognize that the effort has become more ambitious, but they usually express surprise and shock when they finally appreciate the size of the resource shortfall. Curiously, the word creep doesn't connote growth or expansion — it carries instead a sense of gradual change with no direction implied.
That raises several questions. When scope creeps, why does it expand much more often than it contracts? Why don't we ever wake up one morning shocked to find enormous budget surpluses resulting from the gradual ebbing of scope that took place outside our awareness? Why do we never finish projects under budget and early because of out-of-control scope ebbing?
Downscoping does happen, usually when we trim goals to get out of trouble. But downscoping is consciously planned. Scope creep is neither conscious nor planned. The real question is: Why do so many unplanned changes of scope lead to scope expansion instead of scope contraction?
Two classes of mechanisms might explain the dominance of expansion over contraction. First, when we make scope change decisions, we might systematically fail to investigate — or even consider — suggestions that contract scope. Second, when we make such decisions, we might systematically favor alternatives that expand scope.
Because cognitive biases often provide intriguing explanations of behavioral phenomena that seem unrelated to intent, here is Part I of a short catalog of relevant cognitive biases, emphasizing systematic biases inhibiting adoption or consideration of scope contraction strategies.
- Sunk Cost Effect
- To investors, the term sunk cost describes costs already incurred and not recoverable. The sunk cost effect [Staw 1976] is a bias that tends to make us unwilling to terminate an effort, because of the difficulty of accepting failure, even when continuing the effort will only lead to greater losses.
- Irrational Escalation
- Irrational escalationWhy don't we ever wake up in the
morning shocked to find enormous
budget surpluses resulting from
the gradual ebbing of scope
that took place outside
our awareness? bias can cause us to commit increasing levels of resources even when evidence strongly indicates that doing so is foolish. Unlike the Sunk Cost Effect, this bias can take hold even before resources have actually been expended. Mere commitment of resources is all that's required. For example, in bidding wars, the bidders eventually increase their bids well beyond the value of the items sought.
- Endowment Effect
- This bias affects how we value what we possess relative to what we don't. We tend to ascribe greater value to what we have now than we would be willing to pay to acquire it. In the business context, this bias might account for overvaluing work already performed, which could enhance both the sunk cost effect and irrational escalation. We might also overvalue the opportunity to continue work already underway, relative to any work we might do instead.
These three biases can contribute to failure to consider scope reduction alternatives. Next time, we'll examine biases that might make us more receptive to scope expansion. First in this series Next in this series Top Next Issue
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More articles on Project Management:
- Finger Puzzles and "Common Sense"
- Working on complex projects, we often face a choice between "just do it" and "wait, let's
think this through first." Choosing to just do it can seem to be the shortest path to the goal,
but it rarely is. It's an example of a Finger Puzzle.
- Personnel-Sensitive Risks: I
- Some risks and the plans for managing them are personnel-sensitive in the sense that disclosure can
harm the enterprise or its people. Since most risk management plans are available to a broad internal
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- Projects as Proxy Targets: II
- Most projects have both supporters and detractors. When a project has been approved and execution begins,
some detractors don't give up. Here's Part II of a catalog of tactics detractors use to sow chaos.
- Wishful Interpretation: I
- Wishful thinking comes from more than mere imagination. It can enter when we interpret our own observations
or what others tell us. Here's Part I of a little catalog of ways our wishes affect how we interpret
- How We Waste Time: I
- Time is the one workplace resource that's evenly distributed. Everyone gets exactly the same share,
but some use it more wisely than others. Here's Part I of a little catalog of ways we waste time.
Forthcoming issues of Point Lookout
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- When we feel the need to interrupt someone who's speaking in a meeting, to offer a view or information, we would do well to consider (and mitigate) the risk of giving offense. Here are some techniques for interrupting the speaker in situations not addressed by the meeting's formal process. Available here and by RSS on July 4.
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development. Read more about this program. Here's
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