Nine Project Management Fallacies: III

Peter loved his chocolate chip cookies, but he liked this conversation with Trish and Nan even more. Holding his hands over the side of his chair to brush the cookie crumbs off them onto the ground, he added "And his discussion of wishful thinking was really insightful."

Nan broke off a tiny chunk of her cookie, ate it, and sipped her coffee. "Mmmm, I thought so too," she said. "Knowing that we fall into these fallacy traps because of our humanness made me more accepting of it, less guilty."

Trish was puzzled. "Yeah, but how does that help the project?"

"That's just it," said Nan. "Knowing that the fallacies are part of being human makes it easier to acknowledge these errors when we make them."

Peter finished Nan's thought. "And that way we can own up to them faster, maybe even before they do any damage."

Fallacies aren't just false. Because they have a deep connection to what we are as human beings, they'll never go away. Here's Part III of a little catalog of the fallacies of project management. For Part II, see "Nine Project Management Fallacies: II," Point Lookout for December 14, 2005, and for Part IV, see "Nine Project Management Fallacies: IV," Point Lookout for January 11, 2006.

The Fungibility Fallacy

The Fungibility Fallacy holds that each person produces one hour of output in one hour, and that we can substitute people for one another. Terms that suggest this fallacy are man-month headcount and FTE.

Often, only a few people can perform certain tasks. Using the project management tools that distinguish the skills of large numbers of unique individuals takes time and effort, and even then they produce somewhat fictitious results.

And running "lean and mean" makes the problem worse. If you count the cost of delays and lost market windows due to overloading key people, running a little "fatter and kinder" might actually be more profitable.

The Linearity Fallacy

Fallacies have
a deep connection
to what we are
as human beings

This fallacy holds that the human effort required to execute a project scales in proportion to project attributes such as project size or total budget.

Not only do operating costs per unit of output grow rapidly with project size, but the converse is also true: costs decline unexpectedly slowly as we scale the project down in size. This happens because we have difficulty abandoning control processes as we move down in size. We lose in both directions.

Project management is an inherently nonlinear activity. The complexity of an effort grows not in proportion to the effort, but combinatorially with the size of the effort, following the growth in the number of possible person-to-person interactions with increasing team size.

These two fallacies both arise because of our hopes and wishes. We long for a world where we can substitute any person for any other; for a world where doubling resources halves the schedule. But longing doesn't make it so. In the next and final installment of this series we'll look at fallacies that arise from failures of critical thinking. First in this series  Next in this series  Top    Next Issue

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Related articles

More articles on Project Management:

The Risky Role of Hands-On Project Manager

The hands-on project manager manages the project and performs some of the work, too. There are lots of excellent hands-on project managers, but the job is inherently risky, and it's loaded with potential conflicts of interest.

Nonlinear Work: Internal Interactions

In this part of our exploration of nonlinear work, we consider the effects of interactions between the internal elements of an effort, as distinguished from the effects of external changes. Many of the surprises we encounter in projects arise from internals.

Why Scope Expands: I

Scope creep is depressingly familiar. Its anti-partner, spontaneous and stealthy scope contraction, has no accepted name, and is rarely seen. Why?

Down in the Weeds: I

When someone says, "I think we're down in the weeds," a common meaning is that we're focusing on inappropriate — and possibly irrelevant — details. How does this happen and what can we do about it?

Unresponsive Suppliers: I

If we depend on suppliers for some tasks in a project, or for necessary materials, their performance can affect our ability to meet deadlines. What can we do when a supplier's performance is problematic, and the supplier doesn't respond to our increasingly urgent pleas for attention?

See also Project Management and Critical Thinking at Work for more related articles.

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Coming January 27: Cost Concerns: Comparisons

When we assess the costs of different options for solving a problem, we must take care not to commit a variety of errors in approach. These errors can lead to flawed decisions. One activity at risk for error is comparing the costs of two options. Available here and by RSS on January 27.

And on February 3: Cost Concerns: Bias

When we consider the costs of problem solutions too early in the problem-solving process, the results of comparing alternatives might be unreliable. Deferring cost concerns until we fully understand the problem can yield more options and better decisions. Available here and by RSS on February 3.

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