"Customized software" is a widely used form of software development in foreign large, medium and small enterprises. In China, due to the differences in economic environment and traditional management methods, customized software is still a new thing. In fact, most enterprises have their own special requirements for software systems due to their own history and business conditions. On the one hand, the price of general-purpose software in the market may make some enterprises unbearable. The starting number of this note is Big Data Details and Software Customized APP Details Quotation. There are three children in the middle, zero. On the other hand, functions may be difficult to take into account the individual needs of enterprises, so many enterprises turn to customized development. Specifically, customized development is based on the specific situation of enterprises.
With the improvement of enterprise informatization level, many enterprises have realized that using special software can greatly improve the utilization rate of funds, improve the work efficiency of employees, reduce costs and connect with existing businesses.
That is, the general process of software design ideas and methods, including the design of software functions, algorithms and methods, the overall structure design and module design of software, programming debugging, program debugging and testing, and the writing and submission of programs.
Step 1: Demand investigation and analysis
1. Relevant system analysts get a preliminary understanding of the requirements from users, and then use word to list the main functional modules of the system to be developed, and what are the secondary functional modules of each main functional module. When the relevant interfaces of some requirements are clear, a few boundaries can be defined preliminarily in this step.
2. The system analyst deeply understands and analyzes the requirements, and then according to his own experience and requirements, uses WORD or related tools to make the functional requirements document of the document system. This document will specify the general large functional modules of the system, which small functional modules are in the large functional modules, and list the related interfaces and interface functions.
3. The system analyst reconfirms the requirements to the user.
Step 2: Outline design
First, developers need to design software systems, that is, system design. Summary design needs to consider the design of software system, including basic processing flow, organizational structure, module division, function allocation, interface design, operation design, data structure design and error handling design, so as to provide basis for detailed design of software.
Step 3: Detailed design
On the basis of overall design, developers need to design the software system in detail. In the detailed design, it is necessary to describe the main algorithms, data structures, hierarchical structure of classes and call relationships involved in the implementation of specific modules, and explain the design considerations of each program (each module or subroutine) at all levels of the software system for coding and testing. You should ensure that the requirements of the software are completely distributed throughout the software. The detailed design should be detailed enough to be coded according to the detailed design report.
Step 4: Coding
In the software coding stage, according to the design requirements of data structure, algorithm analysis and module realization in the detailed design report of the software system, developers began to write specific programs to realize the functions of each module, so as to meet the requirements of the target system in terms of function, performance and interface.
Step 5: Test
Test the written system. Give it to the user, and the user will confirm each function one by one after use.
Step 6: Prepare for Software Delivery
After the software test proves that the software meets the requirements, the software developer shall submit the developed target installation program, data dictionary of database, user installation manual, user guide, demand report, design report, test report and other products agreed by both parties to the user. The user installation manual should introduce in detail the requirements of the installation software for the running environment, the definition and content of the installation software, the specific installation steps on the client, server and middleware, and the system configuration after installation.
The user's guide should include the use process, operation steps, corresponding business introduction, special tips and precautions of various functions of the software, and examples should be given when necessary.
Step 7: Accept
Step 8: User accepts