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Strategies for Successful Reporting in a Data Warehouse Environment with Actuate Christian Donner Systems Consultant [email protected] The Guiding Principle Any intelligent fool can make things bigger, more complex and more violent. It takes a touch of genius - and a lot of courage to move in the opposite direction. -- Albert Einstein Sun Life of Canada Global financial services firm Assets under management $181 billion Corporate headquarters in Toronto, Canada US headquarters in Wellesley, MA Going public in 2000 The US Group Division Offers life and disability insurance to companies with 10 to 5000 employees Generates yearly revenues of approx. $400 million In 1997 launched a project to reengineer its core business processes and replace systems The data warehouse is part of this system. We call it “Sun Link” How We Sell Group Insurance Broker Sales Rep Sponsor Underwriter Process Improvement Goals Minimize proposal turnaround time Minimize time spent with declines Automate as much as possible Measure turnaround time Count declined and sold cases Make information available to everyone Data Warehouse Definitions According to Ralph Kimball, A Data Warehouse is the queryable source of data in the enterprise A Data Mart is a logical subset of the complete data warehouse Data Warehouse Project Goals Provide a single source of management information for the whole division Provide current up-to-date data Provide a data model that is easy to use and understandable for end-users Allow users to view canned reports, run reports with parameters or create their own report Replace existing reports from different systems Strategy: Many Small Parts The first release in February 99 included prospect measures and reports. The second release went into production in June this year and added workflow and performance measures. The third part in March 2000 will include sales data and reports. The Platform NT 4.0 Server Windows 95 field clients NT 4.0 Workstation developer clients SQL Server 6.5 Actuate 3.2.1 approx. 150 users (20 concurrent) Currently 40 reports in production 32 reports in development 74 database tables Our Strategies Use a dimensional data model for reports Drive the data model from the report information requirements Design the reports with the business users and show them early what it will look like Rebuild database on a nightly basis Use Actuate to generate and distribute reports The Operational Data Model Territory ZipCodeAssignment MailingAddress PartyAddress TerritoryAssignment Employment EmploymentRole CaseSalesRepresentative Party OrganizationAssignment Case OrganizationAssociation CaseSponsor The Dimensional Model Better performance, since only 3 tables in join (as opposed to 13) Easier to read - faster learning for end users Easier and faster to use - higher productivity SalesOrg anizationDimen sion CaseFact SponsorDimension The Database Load Process Full load via bulk copy. Views are used to extract a subset of the data. Stored procedures build dimension, fact and aggregate tables. 2 copies of the database, one is always online! Data Warehouse Staging Area Operational Database Users view pregenerated reports using the viewer Data Warehouse Report Viewer Report Encyclopedia Reports are run daily after completion of the database build Why Actuate? + Server-based architecture + Conventional and Web-based reports + Moderate cost - Ad-hoc query capability - MS Office integration - Metadata-driven Our Strategies With Actuate Get the right people Design for change and build a class library Encapsulate data access in stored procedures Establish an informal process and allow developers to bring in design ideas Find creative solutions for limitations of the product The People Search Crystal Reports Actuate Entry Level Master Level hours days days months Several days of senior level consulting helped us with a jump-start. We found a talented consultant with some Actuate experience to lead the design of the class library and the development process. We assigned one of our own developers to the project who now is the only person to maintain existing and develop new reports. The Class Library Structure AFC base classes Foundation Classes ABS abstract classes Abstract Sun Life Classes, not accessible for developers COM Group reusable collections library classes Low level class library in some cases instantiated directly Compound classes library to allow reuse of complex structures ROD report classes ROD Objects Object layer Local layer of abstraction Report elements can be customized in one place Why Stored Procedures? Encapsulating database dependencies No need to recompile reports Changes can be made fast and easy Performance advantage (in some cases) Business logic is all in one place Centralized Can code maintenance be cross referenced Plain text files can be used with source code management tools The Development Process Work assignment interactively in meetings Report development with Database coding Class library maintenance Test data generation Function test Reviews Version tracking Change management Final tests by test team Deployment Creative Solutions Reports wait for database Environments - database access controlled by user id Dynamic help file location Registry access Static and dynamic hyperlinks (C DLL source code can be downloaded from www.denormalize.com) Multiple Environments Admin Desktop Viewer Report Generation Dev User ID Tst Help HTML Registry Prod Client Actuate Server Database Server Report Demonstration Did we reach our goals? Provide a single source of management information for the whole division Provide current data Provide a data model that is easy to use and understandable for end-users Users can view canned reports, run reports with parameters or create their own report Replace existing reports from various systems with reports from one source! The Key Advantages of Actuate OO concepts facilitate the design for reuse Reuse helps to achieve consistent look and feel with minimal development effort Actuate provides a framework for simple and efficient report distribution throughout the company (and beyond) Still In Need Of A Test Strategy The report layout has changed; fields were added or removed The report structure has changed; a grouping level was added or a similar change has been made The business rules have changed that define the data in the database, but the data is the same The data has changed, but all components remained unchanged Lessons Learned We underestimated complexity and project duration Users don’t know what they need beforehand. We started with the development of the class library without verifying the design. It is impossible to freeze the data model at any time. Feedback is only available if people use the reports. People use the reports if they need them to run their business. Data integrity problems are guaranteed. Report and warehouse administration required more time than we expected. The Next Steps Open database for end users Actuate 4 and web delivery Home page and “personalized contents” Develop a test strategy for reports Extend and enhance the data warehouse Thank you!