Software Development Assumptions Log
This is a practical guide to building a assumptions log for a software development project — a register of the assumptions the plan depends on, to be validated, adapted to the realities of building and shipping a software product or feature set.
What a Assumptions Log is
A assumptions log is a register of the assumptions the plan depends on, to be validated. For the full concept and how it works in general, see Project Assumption. On a software development project it plays the same role, tuned to this kind of work.
Why it matters for a Software Development project
Software Development projects live or die on building and shipping a software product or feature set. A well-built assumptions 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 software development projects drift into avoidable delay and cost.
What to include
- Assumption
- Impact if wrong
- Owner
- Validation status
Software Development-specific considerations
Tailor the assumptions log to the risks that most often derail software development projects:
- Scope creep
- Technical debt slowing delivery
- Third-party dependency risk
Example
On a real software development project, the assumptions log would be shaped by building and shipping a software product or feature set. In particular, it should explicitly account for the project’s biggest risks — scope creep, technical debt slowing delivery, third-party dependency risk — rather than treating them as afterthoughts.