In SDLC, What are the things covered by "Design"?

Is it the flow diagram, User 开发者_Python百科Interface or what?

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In the design phase of the SDLC, making solution is focused via system modeling. Uml modeling is performed which is called the Unified modeling language. UML modeling has the following steps

• Class diagram
• Use case diagram
• Collaboration diagram
• Sequence diagram

The UML modeling is basically for defining the problem or we can say it is a tool to solve the problem.

More : http://websolace.net/web-design-solutions/sdlc-maintains-the-quality/

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From wikipedia:

In systems, design functions and operations are described in detail, including screen layouts, business rules, process diagrams and other documentation. The output of this stage will describe the new system as a collection of modules or subsystems. The design stage takes as its initial input the requirements identified in the approved requirements document. For each requirement, a set of one or more design elements will be produced as a result of interviews, workshops, and/or prototype efforts. Design elements describe the desired software features in detail, and generally include functional hierarchy diagrams, screen layout diagrams, tables of business rules, business process diagrams, pseudocode, and a complete entity-relationship diagram with a full data dictionary. These design elements are intended to describe the software in sufficient detail that skilled programmers may develop the software with minimal additional input.

http://en.wikipedia.org/wiki/Systems_Development_Life_Cycle#Design

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In SDLC (Software Development Life Cycle), given below things covered in Designing phase:

• Partition of requirements into hardware & software system.
• Designing system architecture.
• Creating UML diagrams (class diagram, Use cases, sequence diagrams and Activity diagram)