Các giá trị của tháng này thuộc tính được biểu diễn trên trục Y. Tương tự như vậy, các giá trị của tên sản phẩm thuộc tính và tên cửa hàng được thể hiện trên hai trục khác. Giản đồ chỉ với ba kích thước kinh doanh này thậm chí không giống như một ngôi sao. Tuy nhiên, nó là một chiều Lưu ý Cơ cấu của nhân dân DBMS người đối phó với các điểm Cơ sở dữ liệu Xem lại | 464 DATA WAREHOUSE DEPLOYMENT prove funding for the full data warehouse. You define the scope of the pilot based on the audience. Regardless of the scope this type of pilot must provide a sampling of all the major features to show the utility of the warehouse and how easy it is to get information. You focus on the interaction of the information delivery system with the users. Proof-of-concept pilots work with limited amounts of data. The project team thinks of this type of pilot much earlier in the development scheme. Do not take an inordinately long time. The main goal here is to impress on the minds of the users that the data warehouse is a very effective means for information delivery. Generally no proof-of-concept pilot should take longer than six months to build and explore. You need to keep the focus on effectively presenting the concepts and quickly gaining the approval. Proof-of-Technology Pilot. This is perhaps the simplest and easy to build but as it is mainly built for IT to prove one or two technologies at a time this type of pilot is of little interest to the users. You may just want to test and prove a dimensional modeling tool or a data replication tool. Or you may want to prove the validity and usefulness of the ETL tools. In this type of pilot you want to get beyond the product demonstrations and claims of the vendors and look for yourself. The utility of the proof-of-technology pilots lies in your ability to concentrate and focus on one or two technologies and prove them to your satisfaction. You can check the applicability of a particular type of replication tool to your data warehouse environment. However as the pilot is confined to proving a small part of the collection of all the technologies it does not indicate anything about how all the pieces will work together. This brings us to the next type. Comprehensive Test Pilot. This is developed and deployed to verify that all the infrastructure and architectural components work together and well.
