Core versus context
Core is what differentiates a business in its customers' eyes. Context is everything else that must be done but does not differentiate. Build and invest in core; buy, adopt or outsource context.
Evidence grade: practice A widely adopted practitioner model with clear provenance.
Use it when
Any build, buy or partner decision, alongside total cost of ownership and, at executive scope, control and dependency risk.
Where it stops working
The boundary moves, as yesterday's differentiator becomes a commodity. And "core" is a matter of differentiation, which is a different thing from importance.
Where the standard uses it
- SV-4Engineering economicsHeadcount, budget, cost of delivery, vendors, and build/buy/AI decisions.
Sources
- Geoffrey A. Moore. Dealing with Darwin: How Great Companies Innovate at Every Phase of Their Evolution. Portfolio, 2005. In the bibliography
Used alongside it
- Build, buy, or AI service practice
- Headcount as investment practice
- Sunk-cost discipline research
- Total cost of ownership practice
Cite this model
Chicago, BibTeX and licence →Engineering Management Academy. (2026). Core versus context. In Engineering Management Academy Body of Knowledge (Version 3.1, TEC.core-versus-context). https://www.engineeringmanagement.academy/body-of-knowledge/techniques/core-versus-context