I understand why you ask this question here. It is an odd question to ask in an interview, unless you have a bit of seniority.
It would be quite long to provide a personal answer for this (and not sure I would feel comfortable to do it as I would have to share details of projects I was involved in). But I would say that when a consultant is working in a team in a client, a lot of decisions will impact that client's team. I've done carve outs, created new business lines, optimized product portfolio, introduced new technology that changed business models… all of that had impact on the organizational structure (or team structure), team size, training, how things were done, etc.
And those are never easy moments, as this will impact their day to day, and there are winners, losers, people who love the change, and people who hate it.
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I've asked chatGPT to provide an answer (and revised myself). While not a perfect answer, I believe it can add a bit of flavor to what I just mentioned in the previous paragraphs (although it should cover more deeply the team implications). And also help on how to structure an answer:
Context: "In my previous role as a marketing manager at ABC Corporation, we were tasked with launching a new product line to expand our market share in a highly competitive industry."
Decision Point: "A critical decision I had to make was whether to launch the new product line simultaneously in multiple regions or to adopt a phased approach. The decision was crucial as it would impact the marketing strategy, sales teams, and overall brand perception."
Consequence Analysis: "To make an informed decision, I conducted a thorough analysis of market dynamics in each region, considered the varying consumer behaviors, and assessed the readiness of our sales teams. I also evaluated potential supply chain challenges and the impact on our existing product lines."
Mitigation Strategies: "To mitigate potential challenges, I developed customized marketing campaigns tailored to each region's unique characteristics. I organized targeted training sessions for the sales teams, equipping them with region-specific selling points. Additionally, we established clear communication channels to address any concerns from internal teams and customers."
Outcome: "As a result of this careful planning, the phased launch proved to be successful. Each region received tailored marketing support, and the sales teams were well-prepared, leading to a smoother product introduction. Customer satisfaction was high, and the phased approach allowed us to make timely adjustments to our strategy based on real-time feedback. Ultimately, the decision positively impacted our market penetration and overall business performance."