ALTMAN, EDWARD developed the "ALTMAN Z-SCORE" by examining 85 manufacturing companies. Later, additional "Z-Scores" were developed for private manufacturing companies (Z-Score - Model A) and another for general/service firms (Z-Score - Model B). VentureLine selects the "Z-Score" appropriate for each firm based upon the questionnaire input from the listing company. A "Z-Score" is only as valid as the data from which it was derived i.e. if a company has altered or falsified their financial records/books, a "Z-Score" derived from those "cooked books" is of highly suspect value.