BUILDING AN E-COMMERCE WEBSITE

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BUILDING AN E-COMMERCE WEBSITE

• SDLC(SYSTEM DEVELOPMENT LIFE CYCLE)

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SDLC (Introduction) What is IS IT

• IS (Information System) may deploy in any
  business organization
• INFORMATION SYSTEM (IS)
• an arrangement of people, data, processes, and
  information technology that interact to collect,
  process, store, and provide as output the
  information needed to support an organization.
• INFORMATION TECHNOLOGY(IT)
• Describes the combination of computer technology
  (hardware and software) with telecommunications
  technology (data, image, and voice networks).

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The systems development life cycle (SDLC) is a
methodology for understanding the business
objectives of any system and designing an
appropriate solution. Systems Development
Lifecycle refers to a methodology for developing
systems.
SDLC
whether it is a new system, or an enhancement to
existing systems.OR LEGACY SYSTEM(card pro,
visa plus) BankAlfalah
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SDLC

• The Seven major steps involved in the systems
  development life cycle for an e-commerce site
  are
• Initialization/planning
• Systems analysis
• Systems design
• Building the system
• Testing
• Implementation
• Maintenance

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SDLC (Using Water Fall Model)
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V - Model
OTHER MODELS Incremental model RAD model Agile
model Iterative model Spiral model
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INITIAL INVESTIGATION/PLANNING
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INITIAL INVESTIGATION/PLANNING

• For starters, how do you find the system
  requirements,
• how do you calculate the cost?
• finding the requirements of a system (ecommerce
  website) it whole process on it own.
• You must go trough the companys documents and
  see how it operates, talk to the employees on
  different things they
• you might do that by using questioners or
  conducting interviews.
• Then talk to the customers and everyone involved
  in the day to day activity of the company.
• After you have gathered all the required
  information you start analyzing it.

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SYSTEM ANALYSIS

• The systems analysis step of the SDLC tries to
  answer the question, What do we want the
  e-commerce site to do for our business?
• To answer this, identify the specific business
  objectives for your site, and then develop a list
  of system functionalities and information
  requirements.

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CONCLUSION (Analysis Phase)

• After analysis it where you will come with a
  system that is suitable for the company. You will
  know the type of equipment's they need and
  softwares, then come up with an cost of putting
  the system in place.

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System Design

• In the system design step, you plan on how the
  system functionality and requirements will be
  achieved.
• Two components of system design
• Logical design
• Data flow diagrams, processing functions,
  databases(ERD), security and backup functions
• Physical design
• The physical design translates the logical design
  into physical components.
• Specifies actual physical, software components,
  models, etc.

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Logical Design for a Simple Web Site

• Figure 4.3 (a), Page 211

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Physical Design for a Simple Web Site

• Figure 4.3 (b), Page 211

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BUILDING THE SYSTEM

• In this phase the designs are translated into
  code.
• In building the system, you perform the
  programming of the system and gather and
  implement any data needed. Different high level
  programming languages like C, JSP,PHP,ASP, Java
  are used for coding. There are two basic choices,
  to outsource the building to a vendor or to build
  the site in-house. If you build in-house, you
  will need to determine what if any portions you
  will build from scratch and which you will use
  packaged software for.

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Testing

• Once a site is built, and before it is released
  for general use, it must be tested thoroughly.
  Testing is required whether the system is
  outsourced or built in-house.
• Testing
• Unit testing
• System testing
• Acceptance testing

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IMPLEMENTATION

• The final step, implementation (Deploying the
  Hardware / Software (Result of SDLC previous
  phases)), begins the systems operational life.
  During implementation, the system will need to be
  monitored, checked, tested, and repaired on an
  ongoing basis.
• It initialized the Maintenance Process

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MAINTENANCE

• Software(Website) will definitely undergo change
  once it is delivered to the customer .
• The System evolves(grow) during database
  maintenance.
• Note- This is not compulsory there is only seven
  step in a SDLC but above are generic it varies
  from 3 to 26 according to organization structure
  or needs.