Repairing or renovating a building, facility, or structure to fix damage or improve performance; often used for construction/maintenance work.
この橋は老朽化しているため、来年度に改修工事が行われる。
This bridge is deteriorating, so renovation work will be carried out next fiscal year.
建物の耐震改修を進める必要がある。
It's necessary to proceed with seismic retrofitting of the building.
ソフトウェアのバグを直すだけでなく、設計の改修も検討したほうがいい。
Rather than just fixing the software bugs, it's better to consider redesigning parts of the system.