SYSE.6:3 - Forces

The decision must manage these recurring tensions:

• Current engineering contributors need stable constraints, while architecture knowledge and operating conditions continue to change.
• Whole-System coherence requires cross-boundary constraints, while detailed choices need local specialist knowledge and room to vary.
• A small characteristic set makes trade-offs visible, while omitted affected Systems or scales can move the burden outside the chosen boundary.
• Early estimates are cheaper than realization, while integration and operating evidence are often more decision-relevant.
• Architecture moves such as modularity, reuse, distribution, or standardization can reduce one burden while increasing others—for example, coordination, evidence, latency, supply, cost, or failure-coupling burdens.
• Current contributors need one selected option as a common decision basis, while rejected or deferred alternatives can remain valuable when the environment, technology, or evidence changes.
• AI-assisted synthesis and analysis can widen and criticize alternatives, while authority, accepted loss, and the engineering decision still require an identified decision subject and adequate grounds.
• A decision that is easy to supersede supports continuing change, while a decision with no stable identity or effectivity cannot coordinate implementation and configuration.