Both adjectives mean possible, however, they are slightly different in the world of business, they differ mainly in usage with other words. To understand this very small difference, it is necessary to look at their definition. Feasible means capable of being accomplished or brought about, or capable of being used or dealt with successfully. In another sense, it also means logical or likely. Viable, on the other hand, means capable of living, or developing under favorable conditions. In business, there are some words which can be used only with one of them. For example, feasible project, or viable option.
