Business and Negotiation: This is a cornerstone of Chinese business practice. A negotiator will never walk in with a single, unchangeable plan. They will listen, observe the other party's reactions, and 见机行事, changing their tactics, offers, and tone to best suit the evolving situation.
Travel and Daily Life: Your train is delayed, or the restaurant you picked is closed. What do you do? You 见机行事. You quickly look up alternatives, ask a local for recommendations, and adapt your plans on the fly.
Social Interaction: When you're at a formal dinner or meeting new people, you can't script every conversation. You need to observe the mood, see who is talking to whom, and 见机行事 to join conversations smoothly and appropriately.
Connotation: The connotation is almost always positive, serving as a compliment to someone's intelligence and adaptability. It suggests competence and a high level of situational awareness.