The process of index creation demands highly experienced person who should have detailed knowledge of physical database designing. TIER provides help to these persons to take decision regarding index implementation. Hence, TIER should be able to recommend index for any type of inputted query. Presently, TIER takes simple queries with one level of nesting and simple join queries as input. However, user can input "n" number of queries. To strengthen TIER, it could be expanded in terms of variety of inputted queries, more types of index suggestions, runtime enabling or disabling indexes,...