na-adjective
agile; flexible; nimble; quick to respond
Often used in business or organizational contexts to describe the ability to adapt and act quickly. Can also describe a person's responsive attitude.
この会社は機動的な経営で知られている。
This company is known for its agile management.
彼は機動的に問題を解決した。
He solved the problem in a nimble way.
迅速 means 'swift' or 'rapid', focusing purely on speed. 機動的 includes the nuance of strategic flexibility and readiness to move.
Compound of 機動 (kidō, 'maneuver' or 'mobile operation') and the adjectival suffix 的 (-teki, '-like'). The term likely gained its modern business sense from the concept of military or mechanical mobility.