I do not deny that most managers lack a good deal of information that they should have, but I do deny that this is the most important informational deficiency from which they suffer. It seems to me that they suffer more from an overabundance of irrelevant information.

Unless the information overload to which managers are subjected is reduced, any additional information made available by an MIS cannot be expected to be used effectively.

Most managers have some conception of at least some of the types of decisions they must make. Their conceptions, however, are likely to be deficient in a very critical way, a way that follows from an important principle of scientific economy: The less we understand a phenomenon, the more variables we require to explain it.

Most large mistakes in organizational design come from putting the individual ambitions of the people at the top of the organization ahead of the communication paths for the people at the bottom of the organization.

Managers who don't know how to measure what they want settle for wanting what they can measure. For example, those who want a high quality of work life but don't know how to measure it, often settle for wanting a high standard of living because they can measure it.

Managers of companies, big and small, all want to do well, so they make decisions, hire consultants and implement systems to help them achieve that desired outcome. But all too often, it is not the systems that fail but the ability to maintain them.

beware of management maxims that stop information from flowing freely in your company. For example, consider the old management standard: “Don’t bring me a problem without bringing me a solution.” What if the employee cannot solve an important problem? For example, what if an engineer identifies a serious flaw in the way the product is being marketed? Do you really want him to bury that information? Management truisms like these may be good for employees to aspire to in the abstract, but they can also be the enemy of free-flowing information — which may be critical for the health of the company.

Your first mistake might be assuming that people are rational.
Your second mistake could be assuming that people are eager for change.
And the marketer's third mistake is assuming that once someone knows things the way you know them, they will choose what you chose.

As a corollary, beware of management maxims that stop information from flowing freely in your company. For example, consider the old management standard: “Don’t bring me a problem without bringing me a solution.” What if the employee cannot solve an important problem? For example, what if an engineer identifies a serious flaw in the way the product is being marketed? Do you really want him to bury that information? Management truisms like these may be good for employees to aspire to in the abstract, but they can also be the enemy of free-flowing information — which may be critical for the health of the company.

It is easy to see that there are many ways for leaders to be misinterpreted. To get things right, you must recognize that anything you measure automatically creates a set of employee behaviors. Once you determine the result you want, you need to test the description of the result against the employee behaviors that the description will likely create. Otherwise, the side-effect behaviors may be worse than the situation you were trying to fix.

Informational constraints not only limit the ability of shareholders to control rent-seeking behavior on the part of top managers, they also limit the ability of top managers to control rent-seeking behavior on the part of their subordinates. How much of the time spent by a middle-level manager to prepare a report was absolutely necessary? To what extent was it devoted to acquiring information, of marginal value to the firm, but which would make that manager look relatively good compared to other managers? To what extent are the efforts and resources spent by a manager to cultivate a client really being directed to enhance that manager's job opportunities? Private and organizational objectives are intricately intertwined, and in many cases they are not conflicting. But at the margin they frequently are, and there seems little reason to doubt that private objectives frequently, perhaps usually, win out.

Managers are to information as alcoholics are to booze. They consume enormous amounts, constantly crave more, but have great difficulty in digesting their existing intake.

In such a world, the last thing a teacher needs to give her pupils is more information. They already have far too much of it. Instead, people need the ability to make sense of information, to tell the difference between what is important and what is unimportant, and above all to combine many bits of information into a broad picture of the world.

My experience indicates that most managers receive much more data (if not information) than they can possibly absorb even if they spend all of their time trying to do so. Hence they already suffer from an information overload. They must spend a great deal of time separating the relevant documents. For example, I have found that I receive an average of 43 hours of unsolicited reading material each week. The solicited material is usually half again this amount.