In system implementation strategies, which approach runs the old system and the new system concurrently for a defined period to reduce risk?

Introduction / Context:
Choosing the right cutover strategy balances risk, cost, and speed. Running systems concurrently is a classic way to compare outputs and provide a safety net during transition.

Given Data / Assumptions:

• Objective: minimize risk of service interruption.
• Both legacy and new systems can be operated simultaneously.

Concept / Approach:
Parallel implementation runs both systems at the same time, enabling reconciliation of outputs and rapid rollback if issues arise. It costs more (dual operations) but reduces risk.

Step-by-Step Solution:

Verification / Alternative check:
Cutover plans and reconciliation scripts are hallmarks of parallel conversions.

Why Other Options Are Wrong:
Pilot limits scope to one site; phased limits scope to components; direct swaps immediately with higher risk.

Common Pitfalls:
Underestimating data synchronization and dual maintenance; ensure clear reconciliation procedures and timeframe.

Final Answer:
parallel