LIFE CYCLE OF INFORMATION SYSTEM

LIFE CYCLE OF INFORMATION SYSTEM

1. 2. ANALYSIS

   • 1. What is?
     • Looks all to understand the system, and try to identify problems to fixed.
   • 3. How the new system will fix those problems?
     • A list of requirements are analyzed for the new system.
       • Must meet these requirements.
         • For have improve in the system.
   • 2. To analyze better a system you have to identify
     • Output
       • What happens inside?
     • Processes
       • What comes out?
     • INPUT
       • What goes in?
   • 4. What will be required for the new system?
     • Hardware
     • Software
       • It depends on the number of computers, type of network, output and input special devices.

2. 1. RESEARCH

   • It's made by:
     • OBSERVATION
       • Watching how things work with his/her own eyes.
     • INTERVIEWS
       • Interviewing key people in the business
     • QUESTIONARIES
       • A questionnaire is a quick and simple way to gather information to a large group of people.
     • COLLECTING DOCUMENTS
       • Collect documents to record the informaion the business has.

3. 3. DESIGN

   • STEP 3
     • DATA VERIFICATION TECNICS
       • proof reading
       • double entry
     • data validation
       • format check
       • type check
       • precence check
       • range check
       • length check
     • designing
       • sistem imputs
         • data capture and data imput methods
           • automathic
             • like barcode reader
           • manual
             • like paper forms
       • on screen forms for data imput
         • form controls
           • textbox
           • buttons
           • option radio buttons
           • dropdown menus
       • system processes
         • data and file structure
         • own the data will be processed
       • system outputs
         • on sreen reports
           • the information is showed in digital
         • printed reports
           • the information is showed in paper

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