VB 6.0 to .NET Migration

Case Study: A leading lender / servicer company's enterprise systems reengineering

Objective: Replatforming enterprise Logistics / ERP / Sales / Accounting System to .NET – End-to-End

Existing Application

• VB 5 Desktop Application
• Oracle 8i
• Citrix

The Challenges

• UI elements were being directly referred in the Business Layer resulting in difficulty in conversion to .NET as certain controls in the UI are not easy to convert.
• The objects generated as result of Existing Data Access Layer were not thread safe.
• The business logic was not very well consolidated.
• Existing architecture lacked support for SOA, flexibility and extensibility
• Typical Challenges of Desktop Application (Navigation, Dedicated DB Connections, Application Distribution)
• Licensing issues due to Citrix.
• Deployment issues to multiple client installation.

Re-Platform Key Objectives

• N-tier web based application using .NET technology
• WEB farm using IIS6.0
• SOA based architecture.
• Web Services for integration with external systems
• Framework based on MVC Architecture
• Dynamic Page generation capability
• Dynamic invocation of business layer. (Developer would just Code the business layer and configure the hooking through XML).
• Making Maximum use of Existing Code.
• Add functionality without Framework Recompile!
• A Flexible Validation framework
• Flexibility to Add Smart Clients.
• Scalable.
• Separation of Database Specific API from the .NET Code
• Reusable Component Based Architecture

Impacted Business Lines

• MRP

Number of Users
3000 users

Number of Concurrent Users
1500

Project Duration
24 Months (in progress)

Project Effort
120,000 Hours

Existing Application Line of Code
2 MLOC

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