So you will be able to more effectively meet the current and possibly future needs of the client due to understanding the context of their needs and being able to determine what will fit that situation considering all the other factors, be able to deliver product on schedule due to not having to go through trial and error to figure out what will fit the clients ext needs, be able to not break any laws due to being aware of any codes and regulations to follow.

business factors that drive development of information systems:

need for increased communication
need for more efficient operations
need to make better decisions
need to store and analyse data