| Shared use and isolation | One shared instance can preserve identity and reduce burden; isolated instances can avoid a version conflict but require a supported exchange boundary when their results meet. |
| Precision and effort | Useful constraints expose failures early; an elaborate model of irrelevant relationships increases work without improving the decision. |
| Automation and judgement | Search can check declared relations; a qualified specialist may still need to establish what those relations mean. |
| Retention and change | A fixed composition supports reconstruction; a retained edition may lose a needed correction, source availability or permission. |
| Feasibility and preference | The newest or cheapest candidate may be attractive, but cannot compensate for a failed mandatory condition. |