excellent outcome; highly successful result
A set phrase used to comment that things have gone very well or turned out favorably. Often used in business or formal contexts.
The project has turned out very well.
I received a report that the negotiations went excellently.
A set phrase combining 首尾 (shubi, 'outcome; result') with 上々 (jōjō, 'excellent; very good'). The exact historical derivation is uncertain, but it is a conventional expression for a favorable result.