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This article presents abstracts of articles on management science. The article "Introduction Strategy for New Products With Positive and Negative Word-of-Mouth," published in the journal "Management Science," presents a diffusion model that derives recommendations for advertising timing and forecasts sales in cases where word-of-mouth information may be negative or positive. The model has been tested in the real world on attendance for the film "Gandhi" in the Dallas area, but it has not yet been truly applied to a problem where some client wanted answers. Funding for the research came from Procter & Gamble, which may have had occasion to apply the method in view of their problems with recurring accusations of Satanism. According to the article "A Robust Credit Screening Model Using Categorical Data," published in the journal "Management Science," a decision theory framework is used to generate a mathematical programming approach for an AT&T application where the assumptions required by the standard classical linear discriminant analysis approach are not satisfied.

This article presents an abstract of the article "An Operational Research Approach to Planned Maintenance: Modeling P.M. for a Vehicle Fleet," published in the "Journal of the Operational Research Society." The article presents a model for preventive maintenance for a fleet of tractor units operated by Hiram Walker Ltd. Authors of the article examine the type of data needed to answer questions about the omission of necessary items and inclusion of unnecessary items from the maintenance schedule.

This article presents an abstract of the article "Analytical Evaluation of the Characteristic Curve of a Blood Bank and Its Usefulness in Blood Banking," published in the journal "Computers and Operations Research." According to the article blood that is not used fairly quickly becomes outdated and wasted, so it is important to know how much a blood bank should keep in inventory. The author analyzes data from a Scottish teaching hospital in this blood bank model, which consists of appropriately named renewal processes.