Design Phase in SDLC

Design Phase in SDLC
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  • 0:03 System Development Life Cycle
  • 0:43 Basics of SDLC
  • 1:16 Design Phase
  • 1:46 Key Pieces
  • 2:26 Lesson Summary
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Lesson Transcript
Instructor: Brianna Whiting
Have you ever wondered how a system is created? Designing a new system takes several phases to be completed. This lesson focuses on phase number three, which is the design phase.

System Development Life Cycle

Meet Marge. Marge has just enrolled in her first college course, where she will learn about technology. Her very first assignment is to do a report about the system development life cycle (SDLC). Because SDLC has several different phases, each student is designated a separate phase to fully explain its importance.

Marge is assigned the design phase, which is the third phase in a set of six. Marge is not familiar with SDLC or the design phase, so she decides to do some research. This is what Marge learns about the system development life cycle (SDLC), which is the creation of a new system.

Basics of SDLC

Let's start with what Marge learns about SDLC in general. A system is a combination of components that, when combined, create a finished product. The system development life cycle, therefore, is the term used to describe a six-phase process, which are the components, that are combined to create a new information technology system, which is the finished product.

There are six phases in SDLC:

  1. Planning
  2. Analysis
  3. Design
  4. Coding
  5. Testing
  6. Implementing

Marge has been assigned the design phase, so the remainder of this lesson will be on step three.

Design Phase

The design phase can be referred to as the transformation phase, because this is when an idea is actually transformed into a real working system. Phase two comes to an end once a customer has agreed and signed off on the system. Once this happens, the building begins. Data is formed into charts, and the design team uses those charts to decide the best way for the data to move and be stored. All of the components and security pieces of the system are also determined during the design phase.

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