ISC — Quick Sheet
Systems Development & Change Management
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One-minute revision
- SDLC: planning → analysis → design → development → testing (incl. UAT) → implementation → maintenance
- Test in a separate environment with masked data — never in production
- Conversion risk: parallel lowest, direct cutover highest
- Waterfall (stable requirements) vs. Agile (iterative) vs. DevOps (automated pipeline)
- Change management: request → approve → test → separate migration approval; developer ≠ migrator
- Emergency changes allowed but must be logged and reviewed after the fact