Complex sentence: Implementation constraints, (e.g., concurrency, distribution, persistence, or how the system is to be built) are not considered during the analysis phase; rather, they are addressed during object-oriented design (OOD).
Split into simpler sentences: Implementation constraints, (e.g., concurrency, distribution, persistence, or how the system is to be built) are not addressed in the analysis phase. Rather, they are addressed during object-oriented design (OOD).