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While a tremendous amount of communications takes place by the written word, it is only a fraction of our daily communications by voice. Not only is this type of communication natural for us, but it is also faster. The average human speaking speed is approximately 150 words per minute. This is approximately twice as fast as an average typist.
One of the major benefits of voice input on a computer is that it prevents diversion of the eyes and hands. Typing in data on the keyboards keeps hands and the eyes busy. But with voice input, the eyes and the hands can concentrate on other activities. There are some computer applications where this advantage is major.
The key components of an expert system are the knowledge base, the inference system, the data base, and the user interface.
Expert systems are a special type of knowledge-based systems because they contain heuristic knowledge. It is knowledge that comes directly from those people who have worked for years within the domain. It is knowledge derived from learning by doing. It is the most useful kind of knowledge, related especially to everyday problems, that works for us by producing solutions, decisions, and other positive outcomes.
Knowledge is power, but in a practical sense, it becomes power only when it is applied. Expert systems are a way to achieve results faster.
1. Permit non-experts to do the work of experts 2. Improve productivity by increasing work output by improving efficiency 3. Save time in accomplishing a specific objective 4. Simplify some operations 5. Automate repetitive, tedious, or overly complex processes
Expert systems also offer some additional benefits over conventional softwares, such as:
1. Permit new kinds of problems to be solved thereby making the computer more useful 2. Capture and store valuable knowledge that might be lost due to the resignation, retirement, or death of an expert 3. Make expert knowledge available to a wider audience, thus increasing the problem solving ability of more people
Cost saving is not listed, because expert systems, like most other software, rarely save money. They cost money to develop and use, but the benefits derived usually justify the cost.
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