System Integration Decision Log
This is a practical guide to building a decision log for a system integration project — a record of the key decisions made, by whom and why, adapted to the realities of integrating multiple systems into a coherent whole.
What a Decision Log is
A decision log is a record of the key decisions made, by whom and why. For the full concept and how it works in general, see Decision Log. On a system integration project it plays the same role, tuned to this kind of work.
Why it matters for a System Integration project
System Integration projects live or die on integrating multiple systems into a coherent whole. A well-built decision log gives the team a shared, explicit reference for exactly that — reducing ambiguity, aligning stakeholders, and making problems visible early enough to act. Skipping it, or doing it generically, is how system integration projects drift into avoidable delay and cost.
What to include
- Decision
- Date and owner
- Rationale
- Alternatives considered
- Impact
System Integration-specific considerations
Tailor the decision log to the risks that most often derail system integration projects:
- Interface and API complexity
- Data consistency
- Vendor coordination
Example
On a real system integration project, the decision log would be shaped by integrating multiple systems into a coherent whole. In particular, it should explicitly account for the project’s biggest risks — interface and API complexity, data consistency, vendor coordination — rather than treating them as afterthoughts.