What Are the Different Computer-Assisted Audit Techniques?

Computer aided technology (computer aided technology) is a theory, method, and technology that uses computers as tools to assist people to complete tasks in specific application areas. It includes computer-aided design (CAD), computer-aided manufacturing (CAM), computer-aided instruction (CAI), computer-aided quality control (CAQ), and computer-aided drawing. "Support" emphasizes the leading role of people. Under the control of human beings, the computer and the user constitute a system in which the personal computer interacts closely. CAD and CAM in many computer-aided technologies were first widely used in large manufacturing industries such as aircraft manufacturing, automobile manufacturing and shipbuilding. Since then, it has been gradually extended to the manufacturing of machinery, electronics, textiles and clothing and other engineering projects such as construction and civil engineering. ^[1]

Development of CAD / CAM / CAE technology and

Computer-aided technologies include computer-aided design, computer-aided manufacturing, computer-aided testing, and computer-aided teaching.

1. Computer Aided Design

Computer Aided Design (CAD) is a technology that uses computer systems to assist designers in the design of engineering or products to achieve the best design results. It has been widely used in the fields of aircraft, automobiles, machinery, electronics, construction and light industry. For example, in the design process of electronic computers, CAD technology is used to perform architecture simulation, logic simulation, plug-in division, and automatic wiring. Another example. During the architectural design process. Use CAD technology for mechanical calculations, structural calculations, drawing architectural drawings, etc. The increased degree of design automation in various fields has greatly improved the speed and quality of design.

2. Computer aided manufacturing

Computer Aided Manufacturing (CAM) refers to the use of computer systems to manage and control production equipment such as machine tools. For example, in the manufacturing process of a product, a computer is used to control the operation of the machine, to process the data required in the production process, to control and handle the flow of materials, and to test the product. CAM technology can improve product quality, reduce costs, shorten production cycles, increase productivity and improve labor conditions.

Combining CAD and CAM technologies to get Computer Integrated Manufacturing System (CIMS), which realizes one-stop automation of design and production, will further improve product quality and production efficiency.

3 Computer aided test

Computer Aided Testing (CAT) is the use of computers to help test products, automate testing, and improve test accuracy and speed.

4 Computer aided instruction

Computer Aided Instruction (CAI) is the process of using computers as teaching media and tools to help teachers improve the quality and efficiency of teaching. It is causing changes in educational methods, educational ideas, and even the education system. ^[2]

Computer-aided technology has been widely used in many fields, most widely used in mechanical product design and manufacturing. The applications it includes are:

The profound impact of computer-aided technology is:

(1) It systemizes, standardizes, and engineering people's knowledge in product development. People can continuously pile up the phased results of knowledge engineeringsuccessfully replacing mental labor and further liberating human productivity.

(2) It affects the production and management mode of enterprises (production without drawings), and improves competitiveness (floppy disks, u disks, hard disks, and optical disks become carriers of wealth)-reshaping new relationships in today's society. The CAD technology that has been promoted has been integrated with enterprise informationization.

(3) It has changed the way of product development, working style, and improved the quality of development-creating a new generation of product designers.

CAX technology has been rated as one of the ten outstanding technical achievements since the 1960s. Some people abroad pointed out that CAX is one of the ten advanced science and technology that have the greatest influence on the development of the 20th century. The US Department of Defense has also identified "design automation" as one of the key defense technologies.

CAX is the product of the development of electronic information science, and electronic design is an important area of activity for CAX technology. The popularity of electronic CAD applications at home and abroad has exceeded 90%. Our goal and task is to promote China's late development advantages in electronic design capabilities as soon as possible, and use electronic CAD software tools to design our own ASIC / SOC chips. The hardware (chip design) and software (CAX software development) involved here are two major themes of the development of the information industry. ^[4]

The development trend of computer-aided technology may have the following aspects:

1) Continuous improvement of graphic display technology. Graphics technology is reflected not only in true color maps, but also in fast graphics processing capabilities. Because graphics has always been one of the most important aspects of CAD / CAM technology, with the complexity of design content. The amount of graphics information processed increases. The speed of graphics processing is crucial.

2) Development of new practical modeling system. Feature-based parametric feature modeling is a new technology closely related to product design and manufacturing. Its appearance has provided more convenient tools for product design and manufacturing, and is more suitable for industrial applications. especially. In terms of feature technology related to product data models, in addition to geometric features, the development of new technologies for other types of features is crucial.

3) Computer network. Improving communication technology will lead to a greater amount of information exchange between humans, machines, and computers. It enables engineering designers to work simultaneously in different places. Their work is relatively independent and can exchange information at any time. The use of network technology can fully Share resource. Improve work efficiency.

4) Intelligent. An obvious trend in computer-aided technology is intelligent machines, which are using more and more microprocessors to form a new generation of machines with internal intelligence. The use of artificial intelligence technology for auxiliary design can combine knowledge information processing and numerical information processing, and use expert knowledge to solve special problems. Intelligence here means that the machine can realize intelligence through the information processing processes such as knowledge accumulation, storage, association, analogy, analysis, calculation, comparison, demonstration, and optimization.

5) Engineering database. The combination of engineering database and CAD / CAM system will greatly improve the efficiency of processing complex engineering data information. It can also provide shared information for design, analysis, and manufacturing, laying the foundation for CAD / CAM system integration.

6) Development of external equipment. Sound and vision systems will receive further performance improvements and improvements. Computers use language recognition and input as a means to speed up the input process.

7) Toward integrated manufacturing technology. The purpose of computer integrated manufacturing is to integrate design, manufacturing, production, and management into a unified body, and to expand computers from design and manufacturing to material inventory management, production planning, financial management, and sales. At present, the global manufacturing industry is moving towards CIM. The goal is to achieve a computing-integrated environment for product design, engineering analysis, processing and assembly, and test management, and to organically connect the islands of design and manufacturing.

8) Concurrent engineering. Many research institutions in the United States, Europe, and Japan are working to integrate design work with other stages in the life cycle process, enabling product design and manufacturing to be performed in parallel.

9) Standardization. In order to achieve computer integrated manufacturing systems. Standards for describing product parts are critical. The implementation of STEP, the product data exchange standard, will help data transfer, exchange, modeling, and processing of product parts throughout the production process. ^[3]