System implementation phase: which activities are typically included when putting an information system into production?

Introduction / Context:
The implementation phase transitions the solution into real operations. To control risk, teams employ checkouts, pilots, and sometimes parallel runs to verify correctness and stability.

Given Data / Assumptions:

• The system is built and ready for deployment.
• Risk must be mitigated through validation activities.
• Comparisons with the legacy system may be required.

Concept / Approach:
Checkouts ensure environments are configured properly. Pilot runs validate with a subset of users. Parallel runs, when practical, compare outputs from old and new systems to detect discrepancies before full cutover.

Step-by-Step Solution:

Verification / Alternative check:
Run-books and acceptance criteria should be satisfied during these activities before declaring production success.

Why Other Options Are Wrong:
Each single activity is real but incomplete; best practice bundles them appropriately, hence “All of the above.”

Common Pitfalls:
Skipping rollback planning; inadequate data reconciliation; insufficient user training and support readiness.

Final Answer:
All of the above