End-to-End Secure Legacy System Migration Service

Service Overview

Legacy System Migration and Integration Service is a professional technical delivery service designed to help customers securely and efficiently migrate outdated, isolated business systems to modern platforms, achieving seamless integration with existing IT architectures. The core problem this service addresses is: how to eliminate technical debt, reduce operational costs, and unlock data value without disrupting core business operations.

Our differentiated advantage lies in providing end-to-end migration assurance—from system assessment, migration planning, data migration, application refactoring, to integration testing and go-live cutover—all led by senior architects to ensure business continuity and data integrity.

This service is suitable for enterprises undergoing digital transformation, facing difficulties in maintaining legacy systems, or planning to consolidate IT assets. It is especially ideal for industries with high demands for system stability and data security, such as finance, manufacturing, and government.

Service Content

Customers will receive the following clear deliverables and service items:

Basic Services

1. System Current State Assessment Report: Conduct a comprehensive review of the legacy system's architecture, code, databases, interfaces, and dependencies, outputting a detailed assessment document including risk identification and migration feasibility analysis.
2. Migration Plan Design Document: Includes target architecture design, migration strategy (e.g., phased replacement, parallel running), data mapping rules, rollback plan, and a detailed timeline.
3. Data Migration and Validation Service: Execute full and incremental data migration, and provide a data consistency verification report to ensure zero data loss and zero errors post-migration.
4. Application Refactoring and Adaptation: Perform necessary code refactoring, interface adaptation, or containerization of legacy applications to ensure stable operation in the new environment.
5. Integration Test Report: Complete integration testing between systems, outputting test cases, test results, and performance comparison data to prove that the new system meets functional and performance requirements.
6. Go-Live Cutover and Rollback Support: Provide a go-live cutover operation manual and offer on-site or remote support during the cutover period; execute rollback according to the plan if major issues arise.

Value-Added Services

7. Knowledge Transfer and Training: Provide 2 specialized training sessions for the customer's operations team, covering the new system architecture, operational procedures, and common issue handling, and deliver training documents and operation videos.
8. Post-Migration Support Service: Offer a 1-month support period post-go-live, including daily inspections, performance monitoring, and emergency response to ensure a smooth system transition.

Delivery Process

The service follows a standardized five-phase delivery process to ensure each step is controllable and traceable:

Phase One: Assessment and Planning (2-4 weeks)

• Key Activities: Hold a project kick-off meeting to define scope and objectives; execute system current state assessment; identify dependencies and risks.
• Roles Involved: Customer's business lead, IT lead; our senior architect, project manager.
• Deliverables: "System Current State Assessment Report," "Migration Plan Design Document."

Phase Two: Environment Preparation and Data Migration (4-8 weeks)

• Key Activities: Set up the target environment; develop and test data migration scripts; perform data consistency verification.
• Roles Involved: Our data engineer, development engineer; customer's DBA.
• Deliverables: Migrated test environment, data verification report.

Phase Three: Application Refactoring and Integration Testing (4-8 weeks)

• Key Activities: Refactor and adapt application code; execute integration and performance tests; fix defects.
• Roles Involved: Our development engineer, test engineer; customer's business testers.
• Deliverables: Refactored application package, "Integration Test Report."

Phase Four: Go-Live Cutover (1-2 weeks)

• Key Activities: Develop cutover plan; execute go-live operations; monitor system operation status; prepare rollback plan.
• Roles Involved: Our project manager, operations engineer; customer's IT operations team.
• Deliverables: "Go-Live Cutover Operation Manual," cutover completion confirmation form.

Phase Five: Support and Knowledge Transfer (4 weeks)

• Key Activities: Daily system inspections; performance monitoring and optimization; provide 2 training sessions; deliver operations documentation.
• Roles Involved: Our operations engineer, training instructor; customer's operations team.
• Deliverables: Training documents, support service report.

Service Commitment

We provide the following quantifiable Service Level Agreements (SLAs) to ensure delivery quality and customer satisfaction:

Commitment Item	Metric	Description
Response Time	2-hour response during business hours	For technical issues or urgent requests during migration
Data Integrity	100%	Zero data loss, zero errors post-migration, with verification report provided
System Availability	≥99.9% post-go-live	Percentage of normal operation time for the new system during the support period
Performance Achievement Rate	Not lower than the original system	Post-migration system response time and throughput not lower than the original system baseline
Satisfaction Guarantee	≥90%	Customer satisfaction score at project acceptance; if below 90%, 1 month of additional support will be provided free of charge

Note: Specific SLA metrics can be further detailed in the contract and adjusted based on the complexity of the customer's environment.

Team Qualifications

Our service delivery team consists of experts with over 10 years of experience in enterprise-level system migration. Core members include:

• Project Manager: Holds PMP certification, responsible for overall project coordination and risk management, ensuring timely and quality delivery.
• Senior Architect: Proficient in various legacy systems (e.g., COBOL, AS/400, Oracle Forms) and modern architectures (microservices, cloud-native), leading migration plan design.
• Data Engineer: Experienced in large-scale data migration, familiar with ETL tools and data verification methods, ensuring data security and consistency.
• Development Engineer: Skilled in application refactoring and adaptation, with multi-language development capabilities in Java, .NET, Python, etc.
• Test Engineer: Holds ISTQB certification, responsible for integration testing and performance verification, ensuring system quality.

The team has successfully delivered over 50 large-scale legacy system migration projects, covering industries such as finance, manufacturing, and government, with a cumulative data migration volume exceeding 100TB.

Pricing Model

This service offers flexible billing methods to accommodate projects of different scales and complexities:

1. Fixed Project Price: Suitable for migration projects with a clear scope and stable requirements. Based on the system assessment results, a one-time total price is provided, including all deliverables and standard services. Reference price: Small project (1-2 systems) [To be determined]; Medium project (3-5 systems) [To be determined]; Large project (more than 5 systems) [To be determined].

2. Time and Material Billing: Suitable for exploratory projects with many changing requirements or unclear scope. Rate: [To be determined] RMB/person-day, settled based on actual person-days invested.

3. Hybrid Model: The basic migration part is billed at a fixed project price, while value-added services (e.g., additional training, extended support period) are billed separately on a time and material or fixed fee basis.

Note: The final price depends on system complexity, data volume, migration timeline, and the customer's specific requirements. An accurate quote will be provided after the assessment.