Generalized rough approach to reduction of a decision table

✍ Scribed by Shrabonti Ghosh; S. S. Alam

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 80 KB
• Volume: 18
• Category: Article
• ISSN: 0884-8173
• DOI: 10.1002/int.10100

✦ Synopsis

In this article, Pawlak's rough approach for simplifying a decision table in an information system has been generalized. An information system has been considered in which attribute values are not always quantitative, but rather subjective, having vague or imprecise meanings. Some objects may have attribute values that are almost identical, i.e., they cannot be distinguished clearly by the attributes. Considering this observation, a generalized method has been proposed for reduction of a decision table for different choice values of ␣ and ␤, ␣ being for condition attributes and ␤ for decision attributes where ␣, ␤ ʦ [0, 1]. For ␣ ϭ 1 and ␤ ϭ 1, the method reduces to Pawlak's method. However, for ␣ Ͻ 1 and ␤ Ͻ 1, the proposed method is more flexible than Pawlak's method.