A barrier to the predictability of costs and revenues of electronic commerce projects is the rapid changes in underlying technologies.
The buying and selling of goods and services over the Internet are known as e-commerce.
It is conducted over computers, tablets, smartphones, and other smart devices.
Almost anything can be purchased through e-commerce today; for this reason, e-commerce is often highly competitive.
It can be used in place of physical stores, though some businesses prefer to keep both.
Business-to-business, business-to-consumer, consumer-to-consumer, and consumer-to-business are the four market categories in which e-commerce operates.
By providing cheaper and more efficient distribution channels for their products or services, e-commerce has assisted businesses (particularly those with a limited reach, such as small businesses) in gaining access to and establishing a larger market presence.
Hence, the answer is rapid changes in underlying technologies.
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