Beer Distribution Game

The Beer Distribution Game (The Beer Game) is a simulation game created by a group of professors at MIT Sloan School of management in early 1960s to demonstrate a number of key principles of supply chain management. The game is played by teams of at least four players, often in heated competition, and takes from one to one and a half hours to complete. A debriefing session of roughly equivalent length typically follows to review the results of each team and discuss the lessons involved.

University scientists released the results of a recent analysis that revealed the presence of female hormones in beer. Men should take a concerned look at their beer consumption. The theory is that beer contains female hormones (hops contain phytoeostrogens) and that by drinking enough beer, men turn into women.

To test the theory, 100 men were fed 8 pints of beer each, within 1 hour period. It was then observed that 100% of the test subjects:
Continue reading

Tagged ,

Black Box Theory

Black box theoriesIn science and engineering, a black box is a device, system or object which can be viewed solely in terms of its input, output and transfer characteristics without any knowledge of its internal workings, that is, its implementation is “opaque” (black). Almost anything might be referred to as a black box: a transistor, an algorithm, or the human mind.

Black box theories have been proposed in various fields of philosophy and science by a number of philosophers and scientists. One prominent theory is the black box theory of consciousness, which states that the mind is fully understood once the inputs and outputs are well defined, and generally couples this with a radical skepticism regarding the possibility of ever successfully describing the underlying structure, mechanism, and dynamics of the mind.
Continue reading

Tagged

The Wheel of Retailing Theory

wheel of retailingNew types of retailing frequently start off with crude facilities, little prestige, and a reputation for cutting prices and margins. As they mature, they often acquire more expensive buildings, provide more elaborate services, impose higher margins, and become vulnerable to new competition. The author examines the history of numerous retail institutions to determine if this process really constitutes a “natural law of retailing.”

The wheel of retailing is the theory or observation that new competitors come into established retail markets offering lower prices, greater selection of a limited line of products, or unique products challenging a portion of the market of established firms. The new competitors can do this (and still earn a profit) by minimizing costs through limiting services, smaller stores, or control of inventories. In effect, the new firm is attempting to establish a niche market, attracting a portion of the established firm’s customers. Continue reading

Tagged , , ,

Procedural Justice Theory

Procedural justice theory examines the decision-making process in exchange relation-ships in which one party has decision making authority over issues that concern the other party (Lind & Tyler, 1988). As such, this theory deals with situations analogous to an agent-principal relationship in which the principal delegates decision-making authority to the agent. In contrast to agency theory, which focuses on how the relationship is structured to ensure proper decision making, justice theory examines the decision-making process and its impact on the exchange relationship. Specifically, the theory addresses what constitutes fair decision procedures and the importance of procedural justice to the exchange relationship. Several characteristics of the formal procedures and aspects of the conduct of the decision maker are known to contribute to perceptions of procedural justice. One of the most critical procedural factors is voice, the opportunity to provide input into the decision or control the information used to make the decision. In addition, various aspects of the decision maker’s information sharing are important, including showing consideration of others’ input, giving timely feedback on the results of the decision, and providing adequate justification for the decision (Tyler & Bies, 1990; Korsgaard, Schweiger, & Sapienza, 1995; Sapienza & Korsgaard, 1996) . Continue reading

Tagged , ,

Bayesian Decision Theory

Bayesian Decision Theory in economics, psychology, philosophy, mathematics, and statistics is concerned with identifying the values, uncertainties and other issues relevant in a given decision, its rationality, and the resulting optimal decision. It is very closely related to the field of Game Theory.

In Pattern Recognition, patterns need to be classified. There are a variety of decision rules (such as Nearest Neighbour) but only Bayes Decision Theory is optimal. Bayes Decision Theory is based on the ever popular Bayes Rule.

In this tutorial, we shall investigate the discrete circumstances, as many times in Pattern Recognition, there is a discrete feature vector that must be classfied. This web tutorial includes examples, formulas and an interactive java applet that will hopefully assist anyone wanting to learn the Bayes Decision Rule for discrete features in Pattern Recognition tasks or any other applicaation.

Non-Bayesian Decision Theory

This book aims to present an account of rational choice from a non-Bayesian point of view. Rational agents maximize subjective expected utility, but contrary to what is claimed by Bayesians, the author argues that utility and subjective probability should not be defined in terms of preferences over uncertain prospects. To some extent, the author’s non-Bayesian view gives a modern account of what decision theory could have been like, had decision theorists not entered the Bayesian path discovered by Ramsey, Savage, and Jeffrey. The author argues that traditional Bayesian decision theory is unavailing from an action-guiding perspective. For the deliberating Bayesian agent, the output of decision theory is not a set of preferences over alternative acts – these preferences are on the contrary used as input to the theory. Instead, the output is a (set of) utility function(s) that can be used for describing the agent as an expected utility maximizer, which are of limited normative relevance.

On the non-Bayesian view articulated by the author, utility and probability are defined in terms of preferences over certain outcomes. These utility and probability functions are then used for generating preferences over uncertain prospects, which conform to the principle of maximizing expected utility. It is argued that this approach offers more action guidance.

Tagged ,