Challenges in WS development

1) Work with large and user base.
Solution:
Audit & monitoring.
Multifactor authentication.

2) Long life cycle.
Solution:
Choose solution based on industry standards.

3) Robustness.
Solution:
Architect the solution that will work even if some of it components will go down.

4) Manageability.
Solution:
Take care at monitoring, backup, upgrade.

 5) Integration with legacy applications.
Solution:
Look for interface of other applications.