What is the parallel method?

What is the parallel method?

• A. Introducing the new system and it runs alongside the old system at the same time.
• B. Replacing the old system completely.
• C. Running both systems with no data exchange.
• D. Running two separate systems with no interaction.

Answer: (A)

The parallel method means introducing the new system and running it alongside the old one at the same time. This lets you feed both systems with the same data, compare outputs, and confirm the new system works correctly before turning off the old one. It reduces risk of disruption because you can detect and fix issues while operations continue. Why the other ideas don’t fit: completely replacing the old system lacks the safety check period; running both systems with no data exchange or with no interaction means you’re not validating the new system against real data or ensuring a smooth transition.

The parallel method means introducing the new system and running it alongside the old one at the same time. This lets you feed both systems with the same data, compare outputs, and confirm the new system works correctly before turning off the old one. It reduces risk of disruption because you can detect and fix issues while operations continue.

Why the other ideas don’t fit: completely replacing the old system lacks the safety check period; running both systems with no data exchange or with no interaction means you’re not validating the new system against real data or ensuring a smooth transition.