What is software engineering? What are its essential characteristics? How to eliminate software crisis with software engineering?

○ 1 software crisis refers to a series of serious problems and difficulties encountered in the development, use and maintenance of computer software. It includes two aspects: how to develop software to meet the growing demand for software; How to maintain more and more existing software?

2. The software crisis is manifested in the following four aspects:

(1) The estimation of the cost and progress of software development is often inaccurate. It often happens that the actual cost is one order of magnitude higher than the expected cost, and the actual progress is several months or even years behind the planned progress. However, some expedient measures taken to catch up with the progress and save costs often damage the quality of software products and reduce the reputation of developers. Cause user dissatisfaction. (2) Users are not satisfied with the completed software from time to time. (3) The quality of software products is often unreliable. (4) Software is often not maintainable. (5) Software usually has no proper documentation. Incomplete or unqualified documents will certainly bring many unimaginable difficulties and thorny problems to software development and maintenance. (6) Software cost and software maintenance fee are always in the computer system.

○3 The causes of the software crisis are: (1) The characteristics of the software itself: it is a logical component and lacks visibility; Large-scale, complex and difficult to modify and maintain. (2) Improper software development and maintenance methods: ignoring requirements analysis; Think that software development is equal to programming; Despise software maintenance. (3) The contradiction between supply and demand will be an eternal theme: people are unable to cope with the increasing demand for software.