A useful system map
Most technology problems cross several layers. A slow application may involve code, database design, network latency, overloaded infrastructure, an external service or a manual approval. A secure login may depend on identity proofing, authentication, federation, device condition, authorization, monitoring and recovery. Treating one layer in isolation can move the problem rather than solve it.
A practical reading path
- Digital infrastructure basics
- Requirements and constraints
- System context and boundaries
- How to compare technology systems
- Total cost of ownership
- Resilient system design
Four habits that improve decisions
- Write the problem before naming a product.
- Separate mandatory requirements from preferences.
- Test failure, recovery and exit—not only normal operation.
- Assign ownership for the full lifecycle.
Use the System Decision Scorecard only after the criteria are agreed. Weighting cannot rescue a candidate that fails a true must-have requirement.