1. A method for comparing analyses of changes in cells and tissues of a specimen, which comprises: viewing a number or letter representing a degree of variation for a feature of medical interest in a specimen determined by an analyst and a number or letter representing a consensus degree of variation for such feature in the specimen, wherein such number or letter is selected from a scale of consecutive numbers or letters representing the spectrum of possible variations in such feature and wherein the number or letter is used to indicate a degree of variation of the feature within the scale and wherein such numbers or letters lie along an axis of an orthogonal system; comparing the letter or number representing the degree of variation assigned by the analyst with the number or letter of the consensus degree of variation; setting criteria for accuracy based upon one or more ranges of difference between the letter or number representing the degree of variation assigned by the analyst and the number or letter of the consensus degree of variation; assigning a unique identifier to each such range; and indicating the identifier applicable to the range within which the difference between the degree of variation assigned by the analyst and the number or letter of the consensus degree of variation lies.