If you've ever been in any type of crisis, you know that it is diffcult to stop and think much less make clear decisions. A crisis plan is key to any buisness. It is especially important in a large buisness that spans many different cultures and areas. When everyone knows about the crisis plan, there is no need to stop and try to make a decision. One simply follows the plan. This allows everyone to feel safe and comfortable.
By their very definition, transnational or multinational businesses, that have employees all over the world and operate in many different countries, are much more likely to encounter various crises of different forms precisely because of their global coverage. Therefore it becomes incredibly important that there is a clear and systematic strategy so that everybody knows what they are doing in the case of a crisis.
Many firms operate in countries whose infrastructure, sadly, is not as capable of dealing with natural or man-made crises as well as ours is. (Not that ours is perfect, by a long shot) So to some extent, businesses might be more on their own in taking care of their employees' safety in case something happens. It would be crucial to have a plan ahead of time, and if I were thinking of working in one of these areas, that would be one of the first things I'd ask my potential employer.
The major reason for this is that such a company may well encounter crises. A firm that is active in several countries is vulnerable to any kind of crisis (political, natural, what have you) in any of the countries. Therefore, a plan is absolutely necessary for knowing how to deal with any crises that might arise.
I think that a crisis plan in a multi-national business is extremely important. Given the different backgrounds and nationalities in companies such as these, a plan which is fully explained and understood by all employees is essential. People would simply feel safer.